The Salt Lake Formation is a geologic formation exposed principally in Northern Utah and Southeast Idaho, with other small exposures in Southwest Wyoming and Northeast Nevada. Dates generally range from mid-Miocene to early Pliocene, with most dates falling between 10 Ma to 4 Ma, but perhaps starting as early as 15 Ma and extending to as late as 2 Ma in places. The primarily sedimentary record preserves lacustrine and alluvial fan environments, as well as a few tuffaceous expressions. Preserved fossils include Blancan fauna.
The Nopah Formation is a geologic formation in Utah. It preserves fossils dating back to the Cambrian period.
The Pioche Formation is a geologic formation in Utah and Nevada. It preserves fossils dating back to the Cambrian period.
The Dunderberg Shale is a geologic formation in Nevada and Utah.
The Ely Limestone is a geologic formation in Nevada and Utah. It preserves fossils dating back to the Carboniferous period.
The Hermosa Group is a group of geologic formations in Utah and Colorado. It preserves fossils dating back to the Carboniferous period.
The Fillmore Limestone is a geologic formation in Utah. It preserves fossils dating back to the Ordovician period.
The Fish Haven Dolomite is an Ordovician period geologic formation in southern Idaho, northeastern Nevada, and northwestern Utah.
The Ely Springs Dolomite is an Ordovician period geologic formation in the Southwestern United States.
The Arcturus Formation is a geologic formation in Nevada and Utah, United States. It preserves fossils dating back to the Permian period.
The Plympton Formation is a geologic formation in Utah. It preserves fossils dating back to the Permian period.
The Thaynes Group, Thaynes Formation in older literature, is a geologic group in eastern Idaho, western Wyoming, Utah and eastern Nevada. It includes the Sinbad Formation, Virgin Formation and Shnabkaib Formation. The Thaynes Group is of marine origin. Its formations are interbedded with layers of the non-marine Moenkopi Group.
The Emigrant Springs Formation is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Bonanza King Formation is a geologic formation in Nevada. It preserves fossils dating back to the Cambrian period.
The Sultan Formation is a geologic formation in Nevada. It preserves fossils dating back to the Devonian period.
The Wood Canyon Formation is a geologic formation in the northern Mojave Desert of Inyo County, California and Nye County and Clark County, Nevada.
The Esmeralda Formation is a geologic formation in Nevada. It preserves fossils dating back to the Neogene period.
The Goodwin Limestone is a geologic formation of the Pogonip Group in Nevada.
The Bird Spring Formation is a geologic formation in Nevada. It preserves fossils dating back to the Carboniferous and Permian periods.
The Lone Mountain Dolomite is a dolomite geologic formation in Nevada.
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