State | New Mexico |
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Name | Middle Tertiary volcaniclastic sedimentary units |
Geologic age | Oligocene to upper Eocene |
Lithologic constituents |
Major
Sedimentary > Clastic (Bed, Tuffaceous)GEOLEX - volcaniclastic sediments - mostly sandstone and conglomerates.
Unconsolidated (Alluvial, Fluvial)GEOLEX - volcaniclastic sediments - sand, gravel, boulders, clay, silt.
Minor
Igneous > Volcanic > Felsic-volcanic (Flow, Pyroclastic-ash flow, Pyroclastic-tuff, Volcaniclastic-volcanic breccia)GEOLEX - flows, tuffs, breccia and dikes of rhyolite and dacitic composition.
Igneous > Volcanic > Mafic-volcanic (Flow, Pyroclastic-ash flow, Pyroclastic-tuff, Volcaniclastic-volcanic breccia)GEOLEX - flows, tuffs, breccia and dikes of andesite, basalt, and basaltic-andesite.
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References | New Mexico Bureau of Geology and Mineral Resources, 2003, Geologic Map of New Mexico, scale 1:500,000 (includes some new polygons, faults, and attributes not in NM001 - heads up digitizing by JHorton).USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/https://ngmdb.usgs.gov/Geolex/search |
NGMDB product | |
Counties | Catron - Colfax - Dona Ana - Grant - Hidalgo - Luna - Sandoval - Santa Fe - Sierra - Socorro - Taos - Valencia |