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]
| 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] |
See also edit
References edit
- ^ a b c d Donald C. Ross (1963). "New Cambrian, Ordovician, and Silurian Formations in the Independence quadrangle, Inyo County, California" (PDF). Geological Survey Professional Paper. 475B: B74–B85. ISSN 0096-0446. Wikidata Q66311354.
- ^ a b c Donald Clarence Ross (1966). "Stratigraphy of some Paleozoic formations in the Independence quadrangle, Inyo County, California" (PDF). Geological Survey Professional Paper. 396. doi:10.3133/PP396. ISSN 0096-0446. Wikidata Q61048695.
- ^ Paul Stone; G.C. Dunne; C.H. Stevens; R.M. Gulliver (1989), Geologic map of Paleozoic and Mesozoic rocks in parts of the Darwin and adjacent quadrangles, Inyo County, California, doi:10.3133/I1932, Wikidata Q57855860
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