Age and paleoenvironmental significance of mega-invertebrates from the "San Pedro" Formation in the Coyote Hills, Fullerton and Buena Park, Orange County, Southern California
Open-File Report
2000-319
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Abstract
The "San Pedro" Formation in the Coyote Hills contains an invertebrate fossil as-semblage of 184 taxa from 158 localities. The fauna consists of two annelids, 174 mollusks (80 bivalves, 94 gastropods, and three scaphopods), five arthropods, and three echinoids, along with other minor constituents recognized by not specifically identified during the present study. These fossils are divided into three assemblages; 1) a lower, Pliocene assemblage (which may not differ ecologically from the middle fauna), 2) a middle, cool water assemblage, and 3) an upper, temperate to warm water. These fossils suggest a probably late Pliocene to early Pleistocene age for outcrops of the "San Pedro" Formation in the Coyote Hills. A fourth assemblage with a limited, restricted marine fauna occurs in the overlying Coyote Hills Formation. The occurrence of Solamen columbianum (Dall) (Mollusca: Bivalvia) in the "San Pedro" Formation of the Coyote Hills marks its first occurrence as a fossil. The oldest fossil occurrence of the gastropods Tegula pulligo (Gmelin), questionably Haliotis cracherodii Leach, and the crustacean Randallia ornata (Randell) occurs in the "San Pedroï" Formation in the Coyote Hills.
Suggested Citation
Powell, C.L., Stevens, D., 2000, Age and paleoenvironmental significance of mega-invertebrates from the "San Pedro" Formation in the Coyote Hills, Fullerton and Buena Park, Orange County, Southern California: U.S. Geological Survey Open-File Report 2000-319, 83 p., https://doi.org/10.3133/ofr2000319.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Age and paleoenvironmental significance of mega-invertebrates from the "San Pedro" Formation in the Coyote Hills, Fullerton and Buena Park, Orange County, Southern California |
| Series title | Open-File Report |
| Series number | 2000-319 |
| DOI | 10.3133/ofr2000319 |
| Year Published | 2000 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | 83 p. |
| Country | United States |
| State | California |
| County | Orange County |
| City | Buena Park, Fullerton |
| Other Geospatial | Coyote Hills |