| State | Utah |
|---|---|
| Name | Rhyolites |
| Geologic age | Middle to Late Miocene |
| Lithologic constituents |
Major
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow)
Minor
Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic-tuff, Flow)
|
| Stratigraphic units | Etna, Hogback, Topaz Mountain, Keg Mountains, Gillies Hill, Steamboat Mountain |
| References | Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.Hintze, L.F., 1988, Geologic History of Utah: Brigham Young University Geology Studies Special Publication 7, 202 p. |
| NGMDB product | |
| Counties | Beaver - Box Elder - Garfield - Iron - Juab - Millard - Piute - Salt Lake - Sevier - Tooele |