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Geologic Map of Washington State - USGS
metamorphic rocks Mesozoic amphibolite Mesozoic–Paleozoic amphibolite Tertiary–Cretaceous gneiss Mesozoic gneiss Paleozoic gneiss Tertiary–Cretaceous orthogneiss Mesozoic orthogneiss Mesozoic migmatite and mixed metamorphic and igneous rocks Glaciers and ice fields ƒi Tectonic zones; areas of intense cataclasis, including mylonitization ...
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Geologic Nomenclature and Description - USGS
ngmdb.usgs.govChronostratigraphic Units (arts. 66—79 of the Code) Chronostratigraphic units of a standard geologic time scale designate the position of a material unit relative to the sequence of rocks or sediments of a standard section (global boundary stratotype section and points, GSSPs)1. Examples of chronostratigraphic terms (in
Pattern Chart - USGS
ngmdb.usgs.govGLACIAL AND PERIGLACIAL PATTERNS (Series 500) Glacial patterns (521–524) Periglacial patterns (591–595) SEDIMENTARY PATTERNS (Series 200) IGNEOUS PATTERNS (Series 300) SURFICIAL PATTERNS (Series 100) 601 Gravel or conglomerate (1st option) 602 Gravel or conglomerate (2nd option) 603 Crossbedded gravel or conglomerate 605 Breccia (1st option ...
USGS
ngmdb.usgs.govor dolomite 647 Argillaceous or shaly dolostone or dolomite 648 Cherty dolostone or dolomite 649 Bedded chert (1st option) 650 Bedded chert (2nd option) 651 Fossiliferous bedded chert 659 Bony coal or impure coal 660 Underclay 661 Flint clay 662 Bentonite 663 Glauconite 664 Limonite 665 Siderite 666 Phosphatic-nodular rock 667 Gypsum 668
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