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The Mt. Eden Formation is a geologic formation in Riverside County, California. It underlies the San Timoteo Formation, and preserves fossils dating back to the Neogene period.

Discovery and nomenclature

This geologic formation was initially described in 1921 by paleontologist Childs Frick, who considered the San Timoteo Badlands to be split into three lithologic parts: (1) the Potrero Creek deposits, (2) the San Timoteo Formation, and (3) the Eden beds. The word "Eden" was taken from a large hill of schist located just west of the San Jacinto quadrangle. By 1931, the term "Mt. Eden formation" became prevalent while the term "Eden beds" fell into disuse, and the Potrero Creek deposits ceased to be considered a separate entity.

See also

• List of fossiliferous stratigraphic units in California
• Paleontology in California

References

1. Keroher, G.C. (1966). Lexicon of geologic names of the United States for 1936-1960. Retrieved 2015-01-01.
2. Matti, J. et al. Geologic and Geophysical Maps of the El Casco 7.5′ Quadrangle, Riverside County, Southern California, with Accompanying Geologic-Map Database, p. 1 (USGS, 2015).
3. English, H. Duncan. The Geology of the San Timoteo Badlands, Riverside County, California, p. 36 (Claremont College, 1953).
4. ^ Albright, L. Barry. Biostratigraphy and Vertebrate Paleontology of the San Timoteo Badlands, Southern California, p. 5 (University of California Press, 2000).
5. Wilmarth, M. Grace. Bulletin 896, Lexicon of Geologic Names of the United States, p. 1433 (U.S. Dept. of Interior, 1938).

Bibliography

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
• USGS map
• USGS description of map

• Neogene California