Geologic units in Bingham county, Idaho
Basalt (Quaternary). (Quaternary) at surface, covers 7 % of this area
Fluvial and lake sediment. (Quaternary) at surface, covers 6 % of this area
Sedimentary rocks associated with Basin and Range extension. (Quaternary, Pliocene, and Miocene) at surface, covers 5 % of this area
Fluvial, fan, and lacustrine deposits and intercalated volcanic rocks of the Basin and Range Province (~16-2 Ma); consolidated to weakly consolidated sandstone, siltstone, arkose, conglomerate, mudstone, tuffaceous sediment, basalt, basaltic tephra, and rhyolite tuff. Includes deposits of Lake Idaho (Idaho Group) in western Snake River Plain and Salt Lake Formation deposited in Basin and Range Province of east-central Idaho. (Quaternary to Eocene Continental Sediments and Sedimentary Rocks).
Sedimentary rocks (Triassic). (Triassic) at surface, covers 5 % of this area
Red mudrock and fine-grained sandstone and marine limestone; includes Dinwoody, Woodside, Thaynes, and Ankareh formations in eastern Idaho thrust belt. (Paleocene to Neoproterozoic Sedimentary and Igneous Rocks of the Cordilleran System).
Rhyolite (Pliocene and Miocene). (Pliocene and Miocene) at surface, covers 3 % of this area
Sedimentary rocks (Cretaceous). (Cretaceous) at surface, covers 3 % of this area
Marine and deltaic sandstone and shale of Cordilleran foreland basin (includes Gannett Group, Frontier, Mowry, Kootenay, and Thermopolis formations) in eastern Idaho thrust belt. (Paleocene to Neoproterozoic Sedimentary and Igneous Rocks of the Cordilleran System).
Loess deposits. (Pleistocene) at surface, covers 3 % of this area
Wind-deposited quartzose and calcareous silt in southeastern Idaho. Only shown where thick enough to mask older units; commonly 7-15 m (23-50 ft) thick. (Quaternary Sediments).
Sedimentary rocks (Permian and Pennsylvanian). (Permian and Pennsylvanian) at surface, covers 2 % of this area
Sedimentary rocks (Jurassic). (Jurassic) at surface, covers 1 % of this area
Marginal marine and marine sandstone and limestone; includes Nugget, Twin Creek, Preuss, Morrison, and Stump formations in eastern Idaho thrust belt. (Paleocene to Neoproterozoic Sedimentary and Igneous Rocks of the Cordilleran System).
Challis Volcanic Group. (Eocene) at surface, covers 0.8 % of this area
Sediments and sedimentary rocks (Pleistocene and Pliocene). (Pleistocene and Pliocene) at surface, covers 0.6 % of this area
Alluvial-fan deposits. (Quaternary) at surface, covers 0.3 % of this area
Rhyolite (Pleistocene). (Pleistocene) at surface, covers 0.2 % of this area
Rhyolite tuffs, flows, and domes; includes Yellowstone Group (2.0-0.6 Ma) and isolated domes on Snake River Plain and north of Soda Springs (less than 2.0 Ma). (Quaternary to Eocene Continental Volcanic and Intrusive Rocks).
Sedimentary rocks (Devonian to Ordovician). (Devonian to Ordovician) at surface, covers 0.2 % of this area