Rosario Group
| Rosario Group Stratigraphic range: Late Cretaceous | |
|---|---|
| Type | Group |
| Sub-units |
Cabrillo Formation Point Loma Formation |
| Underlies | Tertiary andesites, Quaternary deposits |
| Overlies | Mesozoic volcanic rocks |
| Thickness | 1,200 m (3,900 ft) |
| Lithology | |
| Primary | Marine mudstones, sandstones, conglomerates |
| Location | |
| Region | Baja California, California |
| Country | Mexico, United States |
| Type section | |
| Named for | El Rosario, Baja California |
The Rosario Group is a Late Cretaceous geologic group in southwestern California (United States) and northwestern Baja California (Mexico). In older literature it was named Rosario Formation.
The Rosario Group includes the Point Loma Formation and Cabrillo Formation subunits in San Diego County, California.
The sedimentary structures of the Rosario Group apparently were formed in a nearshore shelf environment, probably a local embayment.
Fossils
It preserves fossils dating back to the Cretaceous period of the Mesozoic Era.
See also
- Geology of San Diego County, California
- List of fossiliferous stratigraphic units in California
Further reading
- JSTOR.org: "Dynamics of Late Cretaceous Rocky Shores (Rosario Formation) from Baja California, Mexico"; by Halard L. Lescinsky, Jorge Ledesma-Vázquez and Markes E. Johnson; SEPM Society for Sedimentary Geology; PALAIOS, Vol. 6, No. 2 (Apr., 1991), pp. 126-141.
- SDSU.edu: "Paleocurrent analysis of the Cretaceous Rosario Formation"; Bailey, Stephen Milton; 1966-08-10.
External links
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
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