Earth:Deguynos Formation
| Deguynos Formation Stratigraphic range: Neogene | |
|---|---|
| Type | Formation |
| Location | |
| Region | California |
| Country | United States |
The Deguynos Formation is a geologic formation in California, preserving fossils dating back to the Neogene period.
From a geological perspective, the Deguynos Formation is important for understanding the tectonic and sedimentary evolution of the San Andreas fault and the early Gulf of California. Its layers record information on key processes such as basin information, delta growth, and shifts in the northern Gulf shoreline driven by sediment accumulation.[1]
First described in 1963 as a member of the Imperial Formation, it was later reclassified as a distinct formation in 1996 following detailed stratigraphic studies in the Vallecito and Fish Creek Mountain areas.[1]
Location
The Deguynos Formation is situated in the western part of the Salton Trough in southern California, mainly within Imperial County and Anza-Borrego Desert State Park. Its most prominent exposures are found in the Fish Creek-Vallecito basin, just south of Split Mountain Gorge, in a tectonically active zone along the boundary between the North American and Pacific plates. Geological activity in this area, characterized by strike-slip faulting and oblique extension, played a key role in shaping the formation's environment, which developed as part of an elongated seaway connected to the Gulf of California.[2]
See also
- List of fossiliferous stratigraphic units in California
- Paleontology in California
References
- ↑ 1.0 1.1 "Geolex — Imperial publications". https://ngmdb.usgs.gov/Geolex/UnitRefs/ImperialRefs_5629.html.
- ↑ "Stratigraphy, Tectonics, and Basin Evolution in the Anza-Borrego Desert Region". https://www.semanticscholar.org/paper/Stratigraphy,-Tectonics,-and-Basin-Evolution-in-the-Dorsey/1e51ab6005b0b49e34d618d5974ae18c832014e7.
- ((Various Contributors to the Paleobiology Database)). "Fossilworks: Gateway to the Paleobiology Database". https://www.fossilworks.org/.
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