| Al Rose Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Unit of | Mazourka Group [1] |
| Underlies | Badger Flat Limestone [1] |
| Lithology | |
| Primary | siltstone, mudstone, and shale [2] |
| Other | chert [2] |
| Location | |
| Region | Talc City Hills, California [3] |
| Country | United States |
| Type section | |
| Named for | Al Rose Canyon, Inyo County, California [1] |
| Named by | Donald Clarence Ross [1] |
The Al Rose Formation is a geologic formation in California. It consists mostly of siltstone, mudstone and shale, with some chert and occasional limestone. In it are found graptolite and trilobite fossils dating back to the Ordovician period. [2]
The Aztec Sandstone is an Early Jurassic geological formation of primarily eolian sand from which fossil pterosaur tracks have been recovered. The formation is exposed in the Mojave Desert of Arizona, California and Nevada. Aztec Sandstone is named after the Aztec Tank, a lake in the Spring Mountain region of Nevada.
The Bull Fork Formation is a geologic formation in north central Kentucky and southwestern Ohio. It preserves fossils dating back to the Ordovician period.
The Gaptank Formation is a geologic formation in Texas. It preserves fossils dating back to the Carboniferous period.
The Greyson Shale is a geologic formation in Montana. It preserves fossils.
The Ely Limestone is a geologic formation in Nevada and Utah. It preserves fossils dating back to the Carboniferous period.
The Pogonip Group is an Ordovician period geologic group located in southern Nevada and in Utah.
The Diamond Peak Formation is a geologic formation in Nevada. It preserves fossils dating back to the Carboniferous period.
The Vinini Formation is a marine, deep-water, sedimentary deposit of Ordovician to Early Silurian age in Nevada, U.S.A. It is notable for its highly varied, mainly siliceous composition, its mineral deposits, and controversies surrounding both its depositional environment and structural history. The formation was named by Merriam and Anderson for an occurrence along Vinini Creek in the Roberts Mountains of central Nevada and that name is now used extensively in the State.
The Windfall Formation is a geologic formation in northeastern and southern Nevada.
The Johnson Spring Formation is a geologic formation in California. It preserves fossils dating back to the Ordovician period.
The Antelope Valley Limestone is a limestone geologic formation of the Pogonip Group in southern Nevada.
The Badger Flat Limestone is a limestone geologic formation in California.
The Crowder Formation is a geologic formation in the Central and Western Mojave Desert, in northern Los Angeles County and eastern San Bernardino County, in Southern California.
The Schrader Bluff Formation is a geologic formation in Alaska. It preserves fossils dating back to the Cretaceous period,
The Buelna Formation is a geological formation in Mexico. It preserves fossils dating back to the Cambrian period.
The Puerto Blanco Formation is a geologic formation in Mexico. It preserves fossils dating back to the Cambrian period.
The La Ciénega Formation is a geologic formation in Mexico. It preserves fossils dating back to the Carboniferous period.
The Clemente Formation is a geologic formation in Mexico. It preserves fossils dating back to the Ediacaran period.
The Gamuza Formation is a geologic formation in Mexico. It preserves fossils dating back to the Ediacaran period.
The Stanley Shale, or Stanley Group, is a Mississippian stratigraphic unit in the Ouachita Mountains of Arkansas and Oklahoma. First described in Arkansas in 1892, this unit was not named until 1902 by J.A. Taff in his study of the Ouachita Mountains of Oklahoma. Taff assigned the town of Stanley in Pushmataha County, Oklahoma as the type locality, but did not designate a stratotype. After introduction into Arkansas in 1909 by Albert Homer Purdue, the unit was redefined in 1918, when the formation known as the Fork Mountain Slate was abandoned and partially combined into the Stanley Shale. As of 2017, a reference section for the Stanley Shale has yet to be designated.
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