Earth:Siesta Formation
From HandWiki
| Siesta Formation Stratigraphic range: Neogene | |
|---|---|
| Type | Formation |
| Unit of | Contra Costa Group |
| Underlies | Bald Peak Formation |
| Overlies | Moraga Formation |
| Location | |
| Region | California |
| Country | United States |
The Siesta Formation is a geologic formation in California. It preserves fossils dating back to the Neogene period.
This formation overlies the Moraga Formation and underlies the Bald Peak Formation in the Berkeley Hills. It consists of lacustrine, claystone, siltstone, sandstone, tuff, and limestone deposited in a lake environment.[1] The formation is exposed in the syncline-formed Siesta Valley near Orinda where Route 24 crosses.[2]
See also
- List of fossiliferous stratigraphic units in California
- Paleontology in California
References
- ↑ Gerasimov, Stacey H.; Hodgin, Eben B.; Crowley, James L.; Swanson-Hysell, Nicholas L. (1 February 2024). "Chronostratigraphy of Miocene strata in the Berkeley Hills (California Coast Ranges, USA) and the arrival of the San Andreas transform boundary". Geosphere 20 (1): 162–178. doi:10.1130/GES02650.1.
- ↑ "Siesta Valley" (in en). 26 June 2008. http://oaklandgeology.com/2008/06/26/siesta-valley/.
- ((Various Contributors to the Paleobiology Database)). "Fossilworks: Gateway to the Paleobiology Database". https://www.fossilworks.org.
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