Washington State Department of Natural Resources Division of Geology and Earth Resources 1:100,000-Scale Digital Geology of Washington State by Carl F. T. Harris March 26, 1998 Revised by J. Eric Schuster August 10, 2000 GEOGRAPHICAL DATA PROPERTIES Department of Natural Resources' (DNR) geographic data have the following properties: Projection: Lambert Conformal Conic Coordinate system: WA State plane Zone: South (5626) Datum: NAD27 Units: Feet Spheroid: Clarke 186 GEOLOGIC NOTES Scratch Boundaries The reader will find that some boundaries between geologic units are shown as scratch boundaries (data item gcntct.type.cd in the gunit coverage, coded 3). A scratch boundary is a place where differences between data sources were not resolved. Lack of resolution usually occurs because of a lack of resources to investigate the difference. Such a difference is usually seen as an east-west or north-south scratch boundary across which the geologic unit symbols (gunit.label.cd) are different. Although these occurrences represent places where further work could and should be done to resolve the differences, we have purposely left them in the coverages so the data user will know that further work is needed. This is a more honest and useful approach than imposing arbitrary solutions that are not based on field investigations. Scratch boundaries occur both within and between 1:100,000 quadrangles. Geologic Names Persons unfamiliar with the way geologic units are named might be puzzled by the geologic names found in the gunit.main and 100unit data files (gunit.main is the source for age, lithologic, and unit name information in the geologic unit lists on plotted maps, and 100units lists all geologic units in every 1:100,000 quadrangle in Washington, together with age, lithology, and unit name) that accompany the Arc/Info coverages. Geologic names are a combination of a place name and a lithologic term or the word "Formation". When the name of the geologic unit is formal both the place name and the lithologic term or Formation are capitalized. Examples: Grande Ronde Basalt, Silver Point Quartz Monzonite, Roslyn Formation. For informal geologic names only the place name is capitalized. Examples: Mount Pilchuck stock, basalt of Frost Mountain, conglomerate of Bald Mountain. The basalt of Frost Mountain could also be called the Frost Mountain basalt, but the word order that places the lithologic term first is often used to emphasize that the name is informal. In informal names, the word formation is used infrequently; when it is used it is lower case. Ages of Geologic Units The ages of the geologic units shown in the Arc/Info coverages are generally protolith ages. The protolith age is the age the geologic unit formed, as opposed to an age of metamorphism, deformation, or intrusion by igneous rocks. Protolith ages are assigned based on radiometric age data, paleontologic (fossil) evidence, or stratigraphic position. If a protolith age cannot be assigned in any of these ways, it is assigned as "pre" oldest known metamorphism or deformation, oldest known intrusion by intrusive igneous rocks, or onlap of unmetamorphosed sedimentary rocks, whichever is oldest. For example, a geologic unit that had been metamorphosed in the Cretaceous, would be assigned a pre-Cretaceous age. If none of the above information is available, the unit is assigned a "best guess" age. SOURCE DATA The source geologic maps for this project were prepared manually using scale-stable copies of published USGS 1:100,000-scale topographic quadrangle maps as base maps. For most maps, geologists drafted the geologic information onto Mylar overlays that were photographically composited with the base maps to produce master geologic maps; these are copied by DGER staff for distribution. These scale-stable composites are the data source for the digital geologic coverages that we prepared. In a few cases we have obtained digital line work from the USGS to convert and incorporate into our database. At minimum, a change to Age-Lithology nomenclature and conversion to the DGER data structure are required to incorporate these files. As DGER developed its approach to revising and republishing the state geologic map at 1:250,000 scale, we also developed a standard statewide age-lithology symbology scheme for the 1:100,000 geologic quadrangle maps. The 1:100,000-scale maps compiled for the southwest quadrant of Washington were the first set of quadrangles for which we compiled geologic maps as part of the state geologic map project. These quadrangles did not employ the standard symbology scheme because it had not yet been developed. For these quadrangles and for quadrangles compiled by the U.S. Geological Survey (Mount Baker, Sauk River, Skykomish River, Snoqualmie Pass, Seattle, Port Townsend, Chelan, and Wenatchee) we had to convert the original geologic unit symbology to the new statewide standard scheme. This provides continuity among the 1:100,000 digital quadrangles and eases the process of developing the 1:250,000-scale geologic quadrant map. However, because the original maps and the digital maps do not share the same unit symbols, it also makes it more difficult to refer to the unit descriptions and other data contained in the original maps and reports that are not duplicated in the digital coverages. In order to facilitate accessing information from the original maps and reports, we have included a spreadsheet called 100units in the readme directory that is included with the digital coverages. As noted above under Geologic Names, this spreadsheet gives age, lithologic, and name information for each geologic unit in each 1:100,000 quadrangle, and it also presents lists of old symbols and the corresponding new symbols to facilitate relating the original maps and unit descriptions to their digital counterparts. The 1:100,000-scale quadrangle boundaries used for this project were taken directly from the DNR shared GIS database's Quad100 coverage. DGER used this base to assure integration with other DNR GIS data sets. The coastline was digitized directly off of the USGS topographic map to ensure a faithful replication of the original source map. All other open water features were captured directly from the USGS 1:100,000-scale DLG. Further notes on the main data sources and processing of each quadrangle follow. For additional information on sources of geologic map data, descriptions of geologic units, and references, refer to the original maps listed below. Roche Harbor, Q102 Original Map -- As of June, 2000, no conventional geologic map of this quadrangle had been released. Digital Geology -- The geology of the quadrangle was compiled by DGER staff geologist R. L. Logan. J. E. Schuster digitized and attributed the geologic data. Bellingham, Q103 Original Map -- As of June, 2000, no conventional geologic map of this quadrangle had been released. Digital Geology -- The geology of the quadrangle was compiled by DGER staff geologist T. J. Lapen. J. E. Schuster digitized and attributed the geologic data. Mount Baker, Q111 Original Map -- Tabor, R.W.; Haugerud, R. A.; Booth, D. B.; Brown, E. H., 1994, Preliminary geologic map of the Mount Baker 30- by 60-minute quadrangle, Washington: U.S. Geological Survey Open-File Report 94-403, 55p., 2 pl. Digital Geology -- R. W. Tabor created the original Geographic Information System (GIS) files. D. K. Norman, DGER, converted the original geologic unit symbology to Washington Division of Geology and Earth Resources (DGER) statewide 1:100,000 geologic unit symbology. J. E. Schuster, DGER, moved the original GIS data into the DGER data structure. Robinson Mtn., Q105 Original Map -- Stoffel, K. L.; McGroder, M. F., compilers, 1990, Geologic map of the Robinson Mtn. 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-5, 39 p., 1 plate. Digital Geology -- J. D. Dragovich, DGER, compiled the geology of the southwest corner of the quadrangle, which had been left blank on DGER Open File Report 90-5. J. E. Schuster digitized and attributed the geologic data. Oroville, Q106 Original Map -- Stoffel, K. L., compiler, 1990, Geologic map of the Oroville 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-11, 58 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Republic, Q107 Original Map -- Stoffel, K. L., compiler, 1990, Geologic map of the Republic 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-10, 62 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Colville, Q108 Original Map -- Joseph, N. L., compiler, 1990, Geologic map of the Colville 1:100,000 quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-13, 78 p., 1 plate. Digital Geology -- K. G. Ikerd and J. E. Schuster digitized and attributed the geology. Cape Flattery, Q201 Original Map -- As of June, 2000, no conventional geologic map of this quadrangle had been released. The following geologic map was a major source of data for the digital compilation: Tabor, R. W., Cady, W. M., 1978, Geologic map of the Olympic Peninsula, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-994, 2 sheets, scale 1:125,000. Digital Geology -- The geology of the quadrangle was compiled by DGER staff geologists H. W. Schasse and W. M. Phillips. J. E. Schuster digitized and attributed the geologic data. Port Angeles, Q202 Original Map -- As of June, 2000, no conventional geologic map of this quadrangle had been released. The following geologic map was a major source of data for the digital compilation: Tabor, R. W., Cady, W. M., 1978, Geologic map of the Olympic Peninsula, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-994, 2 sheets, scale 1:125,000. Digital Geology -- The geology of the quadrangle was compiled by DGER staff geologist H. W. Schasse. J. E. Schuster digitized and attributed the geologic data. Port Townsend, Q203 Original Maps -- As of June, 2000, no conventional geologic map had been released. Major sources of data for the digital geologic compilation are: Pessl, Fred. Jr.; Dethier, D. P.; Booth, D. B.; Minard, J. P., 1989, Surficial geologic map of the Port Townsend 30- by 60-minute quadrangle, Puget Sound region, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-1198-F, 1 sheet, scale 1:100,000, with 13 p. text; and Whetten, J. T.; Carroll, P. I.; Gower, H. D.; Brown, E. H.; Pessl, Fred, Jr., 1988, Bedrock geologic map of the Port Townsend 30- by 60-minute quadrangle, Puget Sound region, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-1198-G, 1 sheet, scale 1:100,000. Digital Geology -- H. W. Schasse, DGER, compiled the geology. J. E. Schuster digitized and attributed the geology. Sauk River, Q204 Original Map -- Tabor, R. W.; Booth, D. B.; Vance, J. A.; Ford, A. B.; Ort, M. H., 1988, Preliminary geologic map of the Sauk River 30 by 60 minute quadrangle, Washington: U.S. Geological Survey Open-File Report 88-692, 50p., 2 pl. Digital Geology -- R. W. Tabor created the original GIS files. H. W. Schasse, DGER, converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. J. E. Schuster, DGER, moved the original GIS data into the DGER data structure. Twisp, Q205 Original Maps -- Bunning, B. B., compiler, 1990, Geologic map of the east half of the Twisp 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-9, 51 p., 1 plate. Dragovich, J. D.; Norman, D. K., compilers, 1995, Geologic map of the west half of the Twisp 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 95-3, 63 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Omak, Q206 Original Map -- Gulick, C. W.; Korosec, M. A., compilers, 1990, Geologic map of the Omak 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-12, 52 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Nespelem,Q207 Original Map -- Joseph, N. L., compiler, 1990, Geologic map of the Nespelem 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-16, 47 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Chewelah, Q208 Original Map -- Waggoner, S. Z., compiler, 1990, Geologic map of the Chewelah 1:100,000 quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-14, 63 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Forks, Q301 Original Map -- As of June, 2000, no conventional geologic map of this quadrangle had been released. The following geologic map was a major source of data for the digital compilation: Tabor, R. W., Cady, W. M., 1978, Geologic map of the Olympic Peninsula, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-994, 2 sheets, scale 1:125,000. Digital Geology -- The geology of the quadrangle was compiled by DGER staff geologists W. J. Gerstel and W. M. Lingley. J. E. Schuster digitized and attributed the geologic data. Mount Olympus, Q302 Original Map -- As of June, 2000, no conventional geologic map of this quadrangle had been released. The following geologic map was a major source of data for the digital compilation: Tabor, R. W., Cady, W. M., 1978, Geologic map of the Olympic Peninsula, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-994, 2 sheets, scale 1:125,000. Digital Geology -- The geology of the quadrangle was compiled by DGER staff geologists W. J. Gerstel and W. M. Lingley. J. E. Schuster digitized and attributed the geologic data. Seattle, Q303 Original Maps -- Yount, J. C.; Gower, H. D., 1991, Bedrock geologic map of the Seattle 30' by 60' quadrangle, Washington: U.S. Geological Survey Open-File Report 91-147, 37 p., 4 pl. Yount, J. C.; Minard, J. P.; Dembroff, G. R., 1993, Geologic map of surficial deposits in the Seattle 30' x 60' quadrangle, Washington: U.S. Geological Survey Open-File Report 93-233, 2 sheets, scale 1:100,000. Digital Geology -- A. C. Tarr, USGS, scanned and vectorized USGS Open-File Report 93-233. T. J. Walsh, DGER, adapted and added the bedrock geology from USGS Open-File Report 91-147 and converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. J. E. Schuster and T. T. Young, DGER, moved Tarr's GIS data into the DGER data structure and added attributes. Schuster digitized and attributed the bedrock geologic data. Skykomish River, Q304 Original Map -- Tabor, R. W.; Frizzell, V. A., Jr.; Booth, D. B.; Waitt, R. B.; Whetten J. T.; Zartman, R. E., 1993, Geologic map of the Skykomish River 30- by 60-minute quadrangle, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-1963, 1 sheet, scale 1:100,000, with 42 p. text. Digital Geology -- R. W. Tabor, USGS, created the original GIS files. J. D. Dragovich, DGER, converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. J. E. Schuster and T. T. Young, DGER, moved the original GIS data into the DGER data structure. Chelan, Q305 Original Map -- Tabor, R. W.; Frizzell, V. A., Jr.; Whetten, J. T.; Waitt, R. B.; Swanson, D. A.; Byerly, G. R.; Booth, D. B.; Hetherington, M. J.; Zartman, R. E., 1987, Geologic map of the Chelan 30-minute by 60-minute quadrangle, Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-1661, 1 sheet, scale 1:100,000, with 29 p. text. Digital Geology -- The U.S. Forest Service provided a scale-stable copy of the published geologic map. J. D. Dragovich, DGER, converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. J. E. Schuster digitized and attributed the geologic data. Banks Lake, Q306 Original Map -- Gulick, C. W.; Korosec, M. A., compilers, 1990, Geologic map of the Banks Lake 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-6, 20 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Coulee Dam, Q307 Original Map -- Waggoner, S. Z., compiler, 1990, Geologic map of the Coulee Dam 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-15, 40 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Spokane, Q308 Original Map -- Joseph, N. L., compiler, 1990, Geologic map of the Spokane 1:100,000 quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-17, 29 p., 1 plate. Digital Geology -- T. T. Young and J. E. Schuster digitized and attributed the geology. Copalis Beach, Q401 Original Map -- Logan, R. L., compiler, 1987, Geologic map of the south half of the Shelton and south half of the Copalis Beach quadrangles, Washington: Washington Division of Geology and Earth Resources Open File Report 87-9, 15 p., 1 plate, scale 1:100,000. For the north half of the quadrangle, as of June, 2000, no conventional geologic map had been released. Digital Geology -- R. L. Logan, DGER, converted the original geologic unit symbology of DGER Open File Report 87-9 to DGER statewide 1:100,000 geologic unit symbology and compiled the geology of the north half. J. E. Schuster digitized and attributed the geologic data Shelton, Q402 Original Map -- Logan, R. L., compiler, 1987, Geologic map of the south half of the Shelton and south half of the Copalis Beach quadrangles, Washington: Washington Division of Geology and Earth Resources Open File Report 87-9, 15 p., 1 plate, scale 1:100,000. For the north half of the quadrangle, as of June, 2000, no conventional geologic map had been released. Digital Geology -- R. L. Logan, DGER, converted the original geologic unit symbology of DGER Open File Report 87-9 to DGER statewide 1:100,000 geologic unit symbology and compiled the geology of the north half. J. E. Schuster digitized and attributed the geologic data Tacoma, Q403 Original Map -- Walsh, T. J., 1987, Geologic map of the south half of the Tacoma quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 87-3, 10 p., 1 plate, scale 1:100,000. For the north half, as of June, 2000, no conventional geologic map had been released. Digital Geology -- A. C. Tarr, USGS, scanned and vectorized DGER Open File Report 87-3. T. J. Walsh, DGER, converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. T. T. Young and J. E. Schuster, DGER, moved Tarr's GIS data into the DGER data structure and added attributes. T. J. Walsh compiled the geology of the north half of the quadrangle, and J. E. Schuster digitized and attributed the geologic data for the north half of the quadrangle. Snoqualmie Pass, Q404 Original Map -- Frizzell, V. A., Jr.; Tabor, R. W.; Booth, D. B.; Ort, K. M.; Waitt, R. B., 1984, Preliminary geologic map of the Snoqualmie Pass 1:100,000 quadrangle, Washington: U.S. Geological Survey Open-File Report 84-693, 43 p., 1 plate, scale 1:100,000. Digital Geology -- R. W. Tabor, USGS, created the original GIS files. J. D. Dragovich, DGER, converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. J. E. Schuster, DGER, moved the original GIS data into the DGER data structure. Wenatchee, Q405 Original Map -- Tabor, R. W.; Waitt, R. B.; Frizzell, V. A., Jr.; Swanson, D. A.; Byerly, G. R.; Bentley, R. D., 1982, Geologic map of the Wenatchee 1:100,000 quadrangle, central Washington: U.S. Geological Survey Miscellaneous Investigations Series Map I-1311, 26 p.,1 plate, scale 1:100,000. Digital Geology -- The U.S. Forest Service provided a scale-stable copy of the published geologic map. J. D. Dragovich, T. J. Walsh, and J. E. Schuster, DGER, converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. J. E. Schuster digitized and attributed the geologic data. Moses Lake, Q406 Original Map -- Gulick, C. W., compiler, 1990, Geologic map of the Moses Lake 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-1, 9 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Ritzville, Q407 Original Map -- Gulick, C. W., compiler, 1990, Geologic map of the Ritzville 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 90-2, 7 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Rosalia, Q408 Original Map -- Waggoner, S. Z., compiler, 1990, Geologic map of the Rosalia 1:100,000 quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 90-7, 20 p., 1 plate. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Westport, Q501 Original Map -- Logan, R. L., compiler, 1987, Geologic map of the south half of the Chehalis River and Westport quadrangles, Washington: Washington Division of Geology and Earth Resources Open File Report 87-8, 16 p., 1 plate, scale 1:100,000. Digital Geology -- K. G. Ikerd and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Chehalis River, Q502 Original Map -- Logan, R. L., compiler, 1987, Geologic map of the Chehalis River and Westport quadrangles, Washington: Washington Division of Geology and Earth Resources Open File Report 87-8, 16 p., 1 plate, scale 1:100,000. Digital Geology -- K. G. Ikerd and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Centralia, Q503 Original Map -- Schasse, H. W., compiler, 1987, Geologic map of the Centralia quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 87-11, 28 p., 1 plate, scale 1:100,000. Digital Geology -- T. T. Young and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Mount Rainier, Q504 Original Map -- Schasse, H. W., compiler, 1987, Geologic map of the Mount Rainier quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 87-16, 43 p., 1 plate, scale 1:100,000. Digital Geology -- K. G. Ikerd and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Yakima, Q505 Original Maps -- Schuster, J. E., compiler, 1994, Geologic map of the east half of the Yakima 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 94-12, 19 p., 1 pl. Walsh, T. J., compiler, 1986, Geologic map of the west half of the Yakima quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 86-4, 1 sheet, scale 1:100,000, with 9 p. text. Digital Geology -- J. E. Schuster digitized and attributed the geologic data and converted the original geologic unit symbology of DGER Open File Report 86-4 to DGER statewide 1:100,000 geologic unit symbology. Priest Rapids, Q506 Original Map -- Reidel, S. P.; Fecht, K. R., compilers, 1994, Geologic map of the Priest Rapids quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 94-13, 22 p., 1 pl. Digital Geology -- C. F. T. Harris digitized and attributed the geologic data. Connell, Q507 Original Map -- Gulick, C. W., compiler, 1994, Geologic map of the Connell 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 94-14, 18 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Pullman, Q508 Original Map -- Gulick, C. W., compiler, 1994, Geologic map of the Pullman 1:100,000 quadrangle, Washington-Idaho: Washington Division of Geology and Earth Resources Open File Report 94-6, 22 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Ilwaco, Q601 Original Map -- Walsh, T. J., compiler, 1987, Geologic map of the Astoria and Ilwaco quadrangles, Washington and Oregon: Washington Division of Geology and Earth Resources Open File Report 87-2, 28 p., 1 plate, scale 1:100,000. Digital Geology -- J. E. Schuster digitized and attributed the geologic data and converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Astoria, Q602 Original Map -- Walsh, T. J., compiler, 1987, Geologic map of the Astoria and Ilwaco quadrangles, Washington and Oregon: Washington Division of Geology and Earth Resources Open File Report 87-2, 28 p., 1 plate, scale 1:100,000. Digital Geology -- J. E. Schuster digitized and attributed the geologic data and converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Mount St. Helens, Q603 Original Map -- Phillips, W. M., compiler, 1987, Geologic map of the Mount St. Helens quadrangle, Washington and Oregon: Washington Division of Geology and Earth Resources Open File Report 87-4, 59 p., 1 plate, scale 1:100,000. Digital Geology -- T. T. Young and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Mount Adams, Q604 Original Map -- Korosec, M. A., compiler, 1987, Geologic map of the Mount Adams quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 87-5, 39 p., 1 plate, scale 1:100,000. Digital Geology -- A. C. Heinitz and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Toppenish, Q605 Original Maps -- Schuster, J. E., compiler, 1994, Geologic map of the east half of the Toppenish 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 94-10, 15 p., 1 pl. Walsh, T. J., compiler, 1986, Geologic map of the west half of the Toppenish quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 86-3, 1 sheet, scale 1:100,000, with 7 p. text. Digital Geology -- J. E. Schuster digitized and attributed the geologic data and converted the original geologic unit symbology of DGER Open File Report 86-3 to DGER statewide 1:100,000 geologic unit symbology. Richland, Q606 Original Map -- Reidel, S. P.; Fecht, K. R., compilers, 1994, Geologic map of the Richland quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 94-8, 21 p., 1 pl. Digital Geology -- C. F. T. Harris digitized and attributed the geologic data. Walla Walla, Q607 Original Map -- Schuster, J. E., compiler, 1994, Geologic map of the Walla Walla 1:100,000 quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 94-3, 18 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Clarkston and Orofino, Q608 Original Map -- Schuster, J. E., compiler, 1993, Geologic map of the Clarkston 1:100,000 quadrangle, Washington-Idaho, and the Washington portion of the Orofino 1:100,000 quadrangle: Washington Division of Geology and Earth Resources Open File Report 93-4, 43 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. Vancouver, Q703 Original Map -- Phillips, W. M., compiler, 1987, Geologic map of the Vancouver quadrangle, Washington [and Oregon]: Washington Division of Geology and Earth Resources Open File Report 87-10, 27 p., 1 plate, scale 1:100,000. Digital Geology -- T. T. Young and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Hood River, Q704 Original Map -- Korosec, M. A., compiler, 1987, Geologic map of the Hood River quadrangle, Washington and Oregon: Washington Division of Geology and Earth Resources Open File Report 87-6, 40 p., 1 plate, scale 1:100,000. Digital Geology -- A. C. Heinitz, T. T. Young, and J. E. Schuster digitized and attributed the geology. J. E. Schuster converted the original geologic unit symbology to DGER statewide 1:100,000 geologic unit symbology. Goldendale, Q705 Original Maps Phillips, W. M.; Walsh, T. J., 1987, Geologic map of the northwest part of the Goldendale quadrangle, Washington: Washington Division of Geology and Earth Resources Open File Report 87-13, 7 p., 1 pl., scale 1:100,000. Schuster, J. E., compiler, 1994, Geologic maps of the east half of the Washington portion of the Goldendale 1:100,000 quadrangle and the Washington portion of the Hermiston 1:100,000 quadrangle: Washington Division of Geology and Earth Resources Open File Report 94-9, 17 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data and converted the original geologic unit symbology of DGER Open File Report 87-13 to DGER statewide 1:100,000 geologic unit symbology. Hermiston, Q706 Original Map -- Schuster, J. E., compiler, 1994, Geologic maps of the east half of the Washington portion of the Goldendale 1:100,000 quadrangle and the Washington portion of the Hermiston 1:100,000 quadrangle: Washington Division of Geology and Earth Resources Open File Report 94-9, 17 p., 1 pl. Digital Geology -- J. E. Schuster digitized and attributed the geologic data. COVERAGES The spatial information of the geology GIS database is comprised of 10 topologically integrated ARC/INFO coverages. Additional tabular information pertaining to lithology, map authorship, and feature names is contained in several INFO files that relate to the coverages through the use of primary and secondary keys. Gunit This coverage contains the main geological spatial data. It contains both polygon information describing geologic units and arc information describing the contacts between geologic units. Gfault This coverage contains faults and descriptive data. Gfold This coverage contains fold axes and descriptive data. Gattud This coverage contains attitude measurement points (such as strike and dip and foliation) and descriptive data. Gdtsmpl This coverages contains age date sample location points (fossil or radiometric age estimates) and descriptive data. Gvent This coverage contains the locations of volcanic vents and eruptive centers and descriptive data. Gdike This coverage contains individual igneous dikes and descriptive data. Gdikeswarm This coverage contains polygons that enclose areas where igneous dikes are too numerous to show as individual arcs. Gunitpt This coverage contains point locations and descriptive data for geologic polygons that are important, but due to map scale, too small to show as polygons. Gunitln This coverage contains arcs representing geologic units that, due to map scale, are too thin to represent as polygons. Also included are isograd lines, glacial moraines, and lines showing the limits of continental glaciations. COVERAGE DATA STRUCTURES Gunit ( network coverage containing both arc and polygon attribution) DATAFILE NAME: GUNIT.AAT 07/12/2000 11 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 GUNIT# 4 5 B - 25 GUNIT-ID 4 5 B - 29 GCNTCT.ID 7 7 I - Unique number for each arc segment 36 GCNTCT.TYPE.CD 1 1 I - Code value to differentiate types of polygon boundaries (contacts) 37 FLTCNT 1 1 C - Used to flag those contacts that are also faults 38 GMAP.ID 4 4 I - Unique row/column quadrangle identifier GCNTCT.TYPE.CD (geologic contact.type.code) In parentheses are the symbol numbers in lineset rocko.lin. 1 contact (101) 6 contact, approximately located (106) 2 contact, concealed (102) 7 quadrangle boundary (110) 3 contact, scratch boundary (103) 8 glacial ice boundary (108) 4 contact, gradational (104) 9 contact, inferred (77) 5 shoreline (105) FLTCNT (fault-contact) Y yes, the contact is also a fault N no, the contact is not also a fault GMAP.ID (geologic map ID) 102 Roche Harbor 401 Copalis Beach 608 Clarkston and Orofino 103 Bellingham 402 Shelton 703 Vancouver 111 Mt. Baker 403 Tacoma 704 Hood River 105 Robinson Mtn. 404 Snoqualmie Pass 705 Goldendale 106 Oroville 405 Wenatchee 706 Hermiston 107 Republic 406 Moses Lake 108 Colville 407 Ritzville 201 Cape Flattery 408 Rosalia 202 Port Angeles 501 Westport 203 Port Townsend 502 Chehalis River 204 Sauk River 503 Centralia 205 Twisp 504 Mount Rainer 206 Omak 505 Yakima 207 Nespelem 506 Priest Rapids 208 Chewelah 507 Connell 301 Forks 508 Pullman 302 Mount Olympus 601 Ilwaco 303 Seattle 602 Astoria 304 Skykomish River 603 Mount St. Helens 305 Chelan 604 Mount Adams 306 Banks Lake 605 Toppenish 307 Coulee Dam 606 Richland 308 Spokane 607 Walla Walla DATAFILE NAME: GUNIT.PAT 07/12/2000 7 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 GUNIT# 4 5 B - 13 GUNIT-ID 4 5 B - 17 GUNIT.ID 6 6 I - Unique no. for each polygon 23 GUNIT.LABEL.CD 12 12 C - Geologic unit polygon label 35 GMAP.ID 4 4 I - Unique row/column quadrangle identifier GUNIT.LABEL.CD (geologic unit.label.code) Geologic unit polygon labels. Contains abbreviated information on the age, lithology, and name of a geologic polygon. This item is the key used to establish the relationship between the GUNIT coverage and an INFO file called GUNIT.MAIN which contains more detailed information about the age, lithology, and formation name of a polygon of interest. For many geologic units the geologic unit label will have letters and/or numbers enclosed in parentheses. On a conventional geologic map these parenthetical characters would be depicted as subscripts. They are enclosed in parentheses in the Arc/Info databases because there is no way to depict them as subscripts. Gfault (arc coverage) DATAFILE NAME: GFAULT.AAT 07/12/2000 12 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 GFAULT# 4 5 B - 25 GFAULT-ID 4 5 B - 29 GFAULT.ID 5 5 I - Unique no. for each fault in the coverage 34 GFLTSEG.NO 4 4 I - Unique no. for each fault segment in the coverage 38 GFLTSEG.TYPE.CD 3 3 I - Code value used to differentiate fault types and changes in the characteristics of the fault at the segment level 41 GMAP.ID 4 4 I - Unique row/column quadrangle identifier 45 FLTCNT 1 1 C - Used to flag those faults that are also lithologic contacts GFAULT.ID (geologic fault.id) A fault arc is commonly segmented as a result of intersecting different geologic unit polygons. We populate this item in order to keep track of an individual fault regardless of how many segments it has. This item is also a key used to establish the relationship to an INFO file called GFAULT which contains the names of faults, if any. DIGITIZING CONVENTION Faults with asymmetrical ornamentation were digitized using the "right-hand" rule. If the ornamentation on a fault arc is asymmetrical, such as for a normal fault with bar and ball on just one side of the fault, the fault arc is digitized so that the ornamentation is to the right side of the line when looking from the "from" node to the "to" node. In other words, the arc is digitized in the direction of view when looking down the arc with the ornamentation on the right-hand side of the arc. GFLTSEG.TYPE.CD (geologic fault segment.type.code) In parentheses are the symbol numbers in lineset rocko.lin. 1 Fault, unknown offset (110) 2 Fault, unknown offset, approximately located (111) 3 Fault , unknown offset, concealed (112) 4 Fault, unknown offset, queried (113) 5 Fault, unknown offset, approximately located, queried (114) 6 Fault, unknown offset, concealed, queried (115) 49 Fault, unknown offset, inferred (230) 7 Thrust fault, sawteeth on upper plate (116) 8 Thrust fault, approximately located, sawteeth on upper plate (117) 9 Thrust fault, concealed, sawteeth on upper plate (118) 10 Thrust fault, queried, sawteeth on upper plate (119) 11 Thrust fault, approximately located, queried, sawteeth on upper plate (120) 12 Thrust fault, concealed, queried, sawteeth on upper plate (121) 50 Thrust fault, inferred, sawteeth on upper plate (197) 13 Right-lateral strike-slip fault (122) 14 Right-lateral strike-slip fault, approximately located (123) 15 Right-lateral strike-slip fault, concealed (124) 16 Right-lateral strike-slip fault, queried (125) 17 Right-lateral strike-slip fault, approximately located, queried (126) 18 Right-lateral strike-slip fault, concealed, queried (127) 51 Right-lateral strike-slip fault, inferred (198) 19 Left-lateral strike-slip fault (128) 20 Left-lateral strike-slip fault, approximately located (129) 21 Left-lateral strike-slip fault, concealed (130) 22 Left-lateral strike-slip fault, queried (131) 23 Left-lateral strike-slip fault, approximately located, queried (132) 24 Left-lateral strike-slip fault, concealed, queried (133) 52 Left-lateral strike-slip fault, inferred (199) 25 Fracture (302) 26 Fracture, approximately located (303) 27 Fracture, concealed (304) 28 Fracture, queried (305) 29 Fracture, approximately located, queried (306) 30 Fracture, concealed, queried (307) 84 Fracture, inferred (308) 31 Low-angle normal fault, blocks on upper plate (134) 32 Low-angle normal fault, approximately located, blocks on upper plate (135) 33 Low-angle normal fault, concealed, blocks on upper plate (136) 34 Low-angle normal fault, queried, blocks on upper plate (137) 35 Low-angle normal fault, approximately located, queried, blocks on upper plate (138) 36 Low-angle normal fault, concealed, queried, blocks on upper plate (139) 53 Low-angle normal fault, inferred, blocks on upper plate (200) 37 Reverse fault, R on upthrown side (140) 38 Reverse fault, approximately located, R on upthrown side (141) 39 Reverse fault, concealed, R on upthrown side (142) 40 Reverse fault, queried, R on upthrown side (143) 41 Reverse fault, approximately located, queried, R on upthrown side (144) 42 Reverse fault, concealed, queried, R on upthrown side (145) 54 Reverse fault, inferred, R on upthrown side (201) 43 Normal fault, bar and ball on downthrown side (146) 44 Normal fault, approximately located, bar and ball on downthrown side (147) 45 Normal fault, concealed, bar and ball on downthrown side (148) 46 Normal fault, queried, bar and ball on downthrown side (149) 47 Normal fault, approximately located, queried, bar and ball on downthrown side (150) 48 Normal fault, concealed, queried, bar and ball on downthrown side (151) 55 Normal fault, inferred, bar and ball on downthrown side (202) 60 Reverse right-lateral strike-slip fault, R on upthrown side (203) 61 Reverse right-lateral strike-slip fault, approximately located, R on upthrown side (205) 62 Reverse right-lateral strike-slip fault, concealed, R on upthrown side (204) 63 Reverse right-lateral strike-slip fault, queried, R on upthrown side (206) 64 Reverse right-lateral strike-slip fault, approximately located, queried, R on upthrown side (309) 65 Reverse right-lateral strike-slip fault, concealed, queried, R on upthrown side (207) 56 Reverse right-lateral strike-slip fault, inferred, R on upthrown side (208) 66 Reverse left-lateral strike-slip fault, R on upthrown side (209) 67 Reverse left-lateral strike-slip fault, approximately located, R on upthrown side (211) 68 Reverse left-lateral strike-slip fault, concealed, R on upthrown side (210) 69 Reverse left-lateral strike-slip fault, queried, R on upthrown side (212) 70 Reverse left-lateral strike-slip fault, approximately located, queried, R on upthrown side (310) 71 Reverse left-lateral strike-slip fault, concealed, queried, R on upthrown side (213) 57 Reverse left-lateral strike-slip fault, inferred, R on upthrown side (214) 72 Normal left-lateral strike-slip fault, bar and ball on downthrown side (215) 73 Normal left-lateral strike-slip fault, approximately located, bar and ball on downthrown side (217) 74 Normal left-lateral strike-slip fault, concealed, bar and ball on downthrown side (216) 75 Normal left-lateral strike-slip fault, queried, bar and ball on downthrown side (218) 76 Normal left-lateral strike-slip fault, approximately located, queried, bar and ball on downthrown side (311) 77 Normal left-lateral strike-slip fault, concealed, queried, bar and ball on downthrown side (219) 58 Normal left-lateral strike-slip fault, inferred, bar and ball on downthrown side (220) 78 Normal right-lateral strike-slip fault, bar and ball on downthrown side (221) 79 Normal right-lateral strike-slip fault, approximately located, bar and ball on downthrown side (223) 80 Normal right-lateral strike-slip fault, concealed, bar and ball on downthrown side (222) 81 Normal right-lateral strike-slip fault, queried, bar and ball on downthrown side (224) 82 Normal right-lateral strike-slip fault, approximately located, queried, bar and ball on downthrown side (312) 83 Normal right-lateral strike-slip fault, concealed, queried, bar and ball on downthrown side (225) 59 Normal right-lateral strike-slip fault, inferred, bar and ball on downthrown side (226) FLTCNT (fault contact) Y Yes, the fault is also a contact N No, the fault is not also a contact Gfold (arc coverage) DATAFILE NAME: GFOLD.AAT 07/12/2000 11 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 GFOLD# 4 5 B - 25 GFOLD-ID 4 5 B - 29 GFOLD.ID 6 6 I - Unique no. for each fold in the coverage 35 GFOLDSEG.NO 3 3 I - Unique no. for each fold segment in the coverage 38 GFOLDSEG.TYPE.CD 2 2 I - Code value used to differentiate fold types and changes in the characteristics of the fold from segment to segment 40 GMAP.ID 4 4 I - Unique quadrangle identifier based on row and column 44 DIRECTION 1 1 C - Adds plunge arrow to "to" node of fold axis segment when coded "Y". GFOLD.ID (geologic fold.id) A geologic fold is commonly segmented as a result of intersecting different geologic unit polygons. We populate this item in order to keep track of an individual fold regardless of how many segments it has. This item is also a key used to establish the relationship to an INFO file called GFOLD which contains the names of folds, if any. DIGITIZING CONVENTION Folds with asymmetrical ornamentation were digitized using the "right hand" rule. See details above under GFAULT (arc coverage), DIGITIZING CONVENTION. GFOLDSEG.TYPE.CD (geologic fold segment.type.code) In parentheses are the symbol numbers in lineset rocko.lin. 1 Anticline (152) 2 Anticline, approximately located (153) 3 Anticline, concealed (154) 4 Anticline, queried (155) 5 Anticline, approximately located, queried (156) 6 Anticline, concealed, queried (157) 37 Anticline, inferred (188) 7 Overturned anticline (158) 8 Overturned anticline, approximately located (159) 9 Overturned anticline, concealed (160) 10 Overturned anticline, queried (161) 11 Overturned anticline, approximately located, queried (162) 12 Overturned anticline, concealed, queried (163) 38 Overturned anticline, inferred (189) 13 Syncline (164) 14 Syncline, approximately located (165) 15 Syncline, concealed (166) 16 Syncline, queried (167) 17 Syncline, approximately located, queried (168) 18 Syncline, concealed, queried (169) 39 Syncline, inferred (190) 19 Overturned syncline (170) 20 Overturned syncline, approximately located (171) 21 Overturned syncline, concealed (172) 22 Overturned syncline, queried (173) 23 Overturned syncline, approximately located, queried (174) 24 Overturned syncline, concealed, queried (175) 40 Overturned syncline, inferred (191) 25 Monocline, synclinal bend (176) 26 Monocline, synclinal bend, approximately located (177) 27 Monocline, synclinal bend, concealed (178) 28 Monocline, synclinal bend, queried (179) 29 Monocline, synclinal bend, approximately located, queried (180) 30 Monocline, synclinal bend, concealed, queried (181) 41 Monocline, synclinal bend, inferred (192) 31 Monocline, anticlinal bend (182) 32 Monocline, anticlinal bend, approximately located (183) 33 Monocline, anticlinal bend, concealed (184) 34 Monocline, anticlinal bend, queried (185) 35 Monocline, anticlinal bend, approximately located, queried (186) 36 Monocline, anticlinal bend, concealed, queried (187) 42 Monocline, anticlinal bend, inferred (193) DIRECTION Y Yes, plot an arrowhead at the "to" node of the arc segment when the plunge direction of a fold is to be shown N No, or blank, show no plunge arrowhead Gattud (point coverage) DATAFILE NAME: GATTUD.PAT 07/12/2000 9 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 GATTUD# 4 5 B - 13 GATTUD-ID 4 5 B - 17 GATTUD.ID 5 5 I - Unique no. for each structural attitude observation point 22 GMAP.ID 4 4 I - Unique row/column quadrangle identifier 26 GATTUD.CD 2 2 I - Code value used to differentiate among structural attitude observation types 28 GATTUD.STRK.AZM 3 3 I - Strike of feature based on North=0 (or 360 ) azimuth, measured clockwise 31 GATTUD.DIP.ANG 2 2 I - Dip or plunge of feature, expressed as decimal degrees below horizontal GATTUD.CD (geologic structural attitude observation code) In parentheses are the symbol numbers in markerset rocko.mrk. 1 Strike and dip of beds (9) 2 Strike and dip of overturned beds (10) 3 Strike of vertical beds (11) 4 Strike and dip of beds, dip amount unspecified (9) 5 Approximate strike and dip of beds (12) 6 Horizontal beds (28) 7 Strike and dip of foliation (13) 8 Approximate strike and dip of beds, dip amount unspecified (12) 9 Strike of vertical foliation (14) 10 Horizontal foliation (22) 11 Horizontal lineation (16) 12 Bearing and plunge of lineation (17) 13 Strike and dip of beds, top known from sedimentary features (18) 14 Strike and dip of overturned beds, top known from sedimentary features (19) 15 Strike of vertical beds, dot indicates top of beds (20) 16 Strike and dip of joints (21) 17 Strike and dip of foliation, dip amount unspecified (13) 18 Vertical lineation (104) 19 Strike and dip of cleavage (23) 20 Strike of vertical foliation and bedding (25) 21 Crumpled, plicated, crenulated, or undulatory beds and average dip (24) 22 Bearing and plunge of minor antiform (26) 23 Bearing and plunge of minor synform (27) 24 Bearing of lineation, plunge unspecified (17) 25 Strike of vertical joints (29) 26 Strike and dip of overturned beds, dip amount unspecified (10) 27 Strike and dip of foliation and bedding (106) 28 Strike and dip of bedding in phacoids in shear zone (34) 29 Strike and dip of variable foliation (101) 30 Strike of beds, top known from sedimentary features, amount of dip unspecified (18) 31 Strike and dip of bedding in phacoids in shear zones, top known from sedimentary features (109) 32 Strike and dip of bedding in phacoids in shear zones, top known from sedimentary features, dip amount unspecified (109) 33 Strike and dip of variable bedding (24) 34 Strike of variable vertical beds (103) 35 Strike and dip of variable bedding and foliation (107) 36 Strike of variable bedding, dip amount unspecified (24) 37 Strike of cleavage, dip amount unspecified (23) 38 Bearing and plunge of minor antiform, plunge amount unspecified (26) 39 Strike of variable vertical foliation (102) 40 Bearing and plunge of fold in foliation (37) 41 Strike of vertical beds in phacoids in shear zone (110) DIGITIZING CONVENTIONS Planar structural symbols, such as strike and dip and foliation, were digitized with three points; the first two to establish the strike azimuth, and the third to establish the location. To digitize the strike azimuth (that is, generate a value for $angle) look down the strike bar in the direction that places the dip bar on the right ("right-hand" rule), digitize the near end first, then the far end. Digitize the location of the symbol at the intersection of the strike bar and the dip bar. Linear structural symbols, such as lineation and minor fold axes were also digitized with three points, but this time using a "straight-ahead" rule. Looking down the plunge, digitize the near end, then the far end to establish the $angle of the bearing. Digitize the location for the symbol at the "feather" end (as opposed to the point end) of the arrow. Gdtsmpl (Point Coverage) DATAFILE NAME: GDTSMPL.PAT 07/12/2000 10 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 GDTSMPL# 4 5 B - 13 GDTSMPL-ID 4 5 B - 17 GMAP.ID 4 4 I - Unique row/column quadrangle identifier 21 GDTSMPL.METH.CD 2 2 I - Code value used to differentiate between age determination methods 23 GDTSMPL.NO 3 3 I - Unique no. for each age determination sample location point 26 GUNIT.LABEL.CD 12 12 C - Geologic unit 38 AGE 80 80 C - Relative or absolute age of material sampled 118 REMARKS 80 80 C - Notes about a specific age date sample GDTSMPL.METH.CD (geologic date sample.method.code) In parentheses are the symbol numbers in markerset rocko.mrk. 1 Age-date sample, radiometric (30) 2 Age-date sample, fossil (31) GDTSMPL.NO This item contains the map number for each age-date sample. GUNIT.LABEL.CD (geologic unit.label.code) Geologic unit polygon labels. This item is the key used to establish the relationship between the GDTSMPL coverage and an INFO file called GUNIT.MAIN which contains more detailed information about the age, lithology, and formation name of a polygon of interest. AGE The age estimate of the material sampled. Expressed as a relative geologic age, such as Jurassic, or an absolute age, such as 5.6 my (million years) before present. REMARKS This field contains notes about the sample, such as type of age date, the material dated if not the same as the material of the enclosing geologic unit polygon, and the original field sample number. Gvent (Point Coverage) DATAFILE NAME: GVENT.PAT 07/12/2000 7 ITEMS: STARTING IN POSITION 1 NAME COL ITEM NAME WDTH OPUT TYP N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 GVENT# 4 5 B - 13 GVENT-ID 4 5 B - 17 GVENT.ID 3 3 I - Unique no. for each volcanic vent point location 20 GUNIT.LABEL.CD 12 12 C - Geologic unit symbol 32 GMAP.ID 4 4 I - Unique row/column quadrangle identifier GUNIT.LABEL.CD (geologic unit.label.code) Geologic unit symbol. This item is the Key used to establish the relationship between the GVENT coverage and an INFO file called GUNIT.MAIN which contains more detailed information about the age, lithology, and formation name of a volcanic vent of interest. Vents are shown on plots using symbol no. 109 in markerset rocko.mrk. Gdike (Arc Coverage) DATAFILE NAME: GDIKE.AAT 07/12/2000 12 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 GDIKE# 4 5 B - 25 GDIKE-ID 4 5 B - 29 GDIKE.ID 5 5 I - Unique no. for each dike segment 34 GDIKESEG.TYPE.CD 1 1 I - Code to describe changes in the characteristics of the dike at the segment level 35 GUNIT.LABEL.CD 12 12 C - Geologic unit of which the dike is composed 47 DIKE.NM 60 60 C - Name of dike, if any 107 GMAP.ID 4 4 I - Unique row/column quadrangle identifier GDIKESEG.TYPE.CD (geologic dike segment.type.code) In parentheses are the symbol numbers in lineset rocko.lin. 1 Dike (194) 2 Dike, concealed (196) 3 Dike, approximately located (195) GUNIT.LABEL.CD (geologic unit.label.code) Geologic unit labels. This item is the key used to establish the relationship between the GDIKE coverage and an INFO file called GUNIT.MAIN which contains more detailed information about the age, lithology, and formation name of a dike of interest. Gdikeswarm (network coverage containing both arc and polygon attribution) DATAFILE NAME: GDIKESWARM.AAT 07/12/2000 10 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 GDIKESWARM# 4 5 B - 25 GDIKESWARM-ID 4 5 B - 29 GDSCNT.ID 7 7 I - Unique no. for each dike swarm polygon-boundary arc segment 36 GDSCNT.TYPE.CD 1 1 I - Code to describe changes in the characteristics of a dike swarm polygon- boundary from arc segment to arc segment 37 GMAP.ID 4 4 I - Unique row/column quadrangle identifier GDSCNT.TYPE.CD In parentheses are the symbol numbers in lineset rocko.lin. 1 contact (101) 3 contact, scratch boundary (103) 5 shoreline (105) 7 quadrangle boundary (110) Note: If the GDIKESWARM coverage is plotted with the GUNIT coverage, then only the scratch boundary needs to be plotted from GDIKESWARM. The other types of dike swarm boundary are present and plotted from GUNIT. Areas covered by dike swarms are shown using patterns. DATAFILE NAME: GDIKESWARM.PAT 07/13/2000 6 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 GDIKESWARM# 4 5 B - 13 GDIKESWARM-ID 4 5 I - 17 GDIKESWARM.ID 5 5 I - Unique no. for each dike swarm 22 GUNIT.LABEL.CD 12 12 C - Geologic unit of which the dike swarm is composed 34 GMAP.ID 4 4 I - Unique row/column quadrangle identifier Gunitln (Arc Coverage) DATAFILE NAME: GUNITLN.AAT 07/13/2000 8 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WIDTH OPUT TYP N.DEC 1 FNODE# 4 5 B - 5 TNODE# 4 5 B - 9 LPOLY# 4 5 B - 13 RPOLY# 4 5 B - 17 LENGTH 4 12 F 3 21 GUNITLN# 4 5 B - 25 GUNITLN-ID 4 5 B - 29 GUNITLN.ID 5 5 I - Unique no. for each non-dike linear geologic feature 34 GUNIT.LABEL.CD 12 12 C - Non-dike linear geologic unit symbol 46 GMAP.ID 3 3 I - Unique row/column quadrangle identifier 49 GUNITLN.TYPE.CD 3 3 I - Code to describe changes in the characteristics of a non-dike linear geologic unit from segment to segment GUNIT.LABEL.CD (geologic unit.label.code) Geologic unit labels. This item is the key used to establish the relationship between the GUNITLN coverage and an INFO file called GUNIT.MAIN which contains more detailed information about the age, lithology, and formation name of a non-dike linear geologic unit of interest. GUNITLN.TYPE.CD In parentheses are the symbol numbers in lineset rocko.lin. 1 Linear geologic unit, other than dike. (Includes marble beds, tuff beds, kyanite or staurolite isograds, ironstone beds, glacial moraines, and basalt flows.) (227) 2 Continental ice limit (228) 3 Linear geologic unit, concealed. (Includes concealed tuff beds, kyanite isograds, and staurolite isograds.) (229) Gunitpt (Point Coverage) DATAFILE NAME: GUNITPT.AAT 07/13/2000 7 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WIDTH OPUT TYP N.DEC 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 GUNITPT# 4 5 B - 13 GUNITPT-ID 4 5 B - 17 GUNITPT.ID 5 5 I - Unique no. for each geologic unit point feature 22 GUNIT.LABEL.CD 12 12 C - Geologic unit label of a geologic unit point feature 34 GMAP.ID 3 3 I - Unique row/column quadrangle identifier GUNIT.LABEL.CD (geologic unit.label.code) Geologic unit labels. This item is the key used to establish the relationship between the GUNITPT coverage and an INFO file called GUNIT.MAIN which contains more detailed information about the age, lithology, and formation name of a geologic unit point feature of interest. Geologic unit point features are shown on plots using symbol no. 105 in markerset rocko.mrk. INFO DATA FILES Gmap DATAFILE NAME: GMAP 07/13/2000 4 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 GMAP.SCL 7 7 I - Source map scale 8 GMAP.COMPILE.YR 4 4 I - Compilation date 12 GMAP.AUTHOR.NM 100 100 C - Author's name 112 GMAP.ID 4 4 I - Unique row/column quadrangle identifier 116 NOTES 80 80 C Gmap.txt DATAFILE NAME: GMAP.TXT 07/13/2000 2 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 GMAP.REF.TXT 80 80 C - Map title 81 GMAP.ID 4 4 I - Unique row/column quadrangle identifier Gunit.main DATAFILE NAME: GUNIT.MAIN 07/13/2000 10 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 GUNIT.LABEL.CD 12 12 C - Geologic unit label 13 GUNIT.REL.AGE.CD 5 5 C - Relative age code; the age portion of the geologic unit label 18 GUNIT.MJ.LITH.CD 3 3 C - Major lithology 21 GUNIT.SSCRPT.TXT 4 4 C - Subscript portion of the geologic unit label; numeric subscripts are finer distinctions of age than those found in GUNIT.AGE.TXT 25 GUNIT.AGE.NO 5 5 N 2 Numeric code to allow sorting of geologic units by age 30 GUNIT.AGE.TXT 40 40 C - Age of the geologic unit 70 GUNIT.LITH.NO 5 5 N 2 Numeric code to allow sorting of geologic units by lithology: unconsolidated deposits, sedimentary rocks and deposits, extrusive igneous (volcanic) rocks, intrusive igneous rocks, then metamorphic rocks 75 GUNIT.LITH.CD 10 10 C - Lithology code; the lithology portion of the geologic unit label 85 GUNIT.LITH.TXT 100 100 C - Text describing lithology 185 GUNIT.NOTE.TXT 100 100 C - Formal or informal name of geologic unit, if any, and/or additional lithologic information, if any . 285 SYMBOL 4 4 I - Code representing color and pattern for plotting. GUNIT.MJ.LITH.CD (geologic unit.major.lithology.code) EXT Extrusive Igneous INT Intrusive Igneous MET Metamorphic SED Sedimentary VAS Volcanic and Sedimentary UNC Unconsolidated Example record from GUNIT.MAIN for unit Qvba(pc), a Quaternary basaltic andesite flow: GUNIT.LABEL.CD = Qvba(pc) GUNIT.REL.AGE.CD = Q GUNIT.MJ.LITH.CD = EXT GUNIT.SSCRPT.TXT = pc GUNIT.AGE.NO = 1.00 GUNIT.AGE.TXT = Holocene GUNIT.LITH.NO = 39.10 GUNIT.LITH.CD = vba GUNIT.LITH.TXT = basaltic andesite flows GUNIT.NOTE.TXT = Puny Creek, basaltic andesite flows of Gfault DATAFILE NAME: GFAULT 07/13/2000 3 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 GFAULT.ID 5 5 I - Fault.id from GFAULT coverage 6 GFAULT.NM 60 60 C - Fault name 66 GMAP.ID 4 4 I - Unique row/column quadrangle identifier Gfold DATAFILE NAME: GFOLD 07/13/2000 3 ITEMS: STARTING IN POSITION 1 COL ITEM NAME WDTH OPUT TYP N.DEC 1 GFOLD.ID 6 6 I - Fold.id from GFOLD coverage 7 GFOLD.NM 60 60 C - Fold name 67 GMAP.ID 4 4 I - Unique row/column quadrangle identifier