Horse Spring Formation
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| Horse Spring Formation | |
|---|---|
| Stratigraphic range: Neogene | |
 Horse Spring Formation with stromatolite fossils | |
| Type | Sedimentary |
| Sub-units | Lovell Wash member, Bitter Ridge Limestone, Thumb member, Rainbow Gardens member[1] |
| Underlies | Muddy Creek Formation |
| Lithology | |
| Primary | conglomerate, sandstone, and limestone |
| Location | |
| Region | Nevada |
| Country | United States |
The Horse Spring Formation is a geologic formation in Nevada. It preserves fossils dating back to the Neogene period.[2] The lower unit is conglomerate and the middle and upper are sandstone and freshwater limestone.[3]
