Fernando Formation

Fernando Formation
Stratigraphic range: Plio-Pleistocene
Type	Geologic formation
Underlies	Pico Formation
Overlies	Repetto Formation
Lithology
Primary	Mudstone, siltstone, sandstone
Location
Region	Los Angeles Basin, Santa Monica Mountains Los Angeles County, California
Country	United States

The Fernando Formation is a Plio-Pleistocene marine mudstone, siltstone and sandstone formation in the greater Los Angeles Basin, Ventura Basin,[1] and Santa Monica Mountains, in Los Angeles County of Southern California.

Geology

Outcrops of the formation in Santa Monica Mountains National Recreation Area have produced fossil shark teeth.[2][3]

Classification

The underlying Repetto Formation is equivalent in age to the Fernando Formation, and some researchers consider it as well as the overlying Pico Formation to be a junior synonym based on benthic foraminifera stages.[4] Other researchers maintain that the Repetto and Pico Formations are distinct stratigraphic units, and that the use of the name "Fernando Formation" should be stopped due to several issues with stratigraphic correlation and access to the type section.[5]

See also

• Geology of Los Angeles County, California

References

1. Liddicoat, 2001
2. Hunt, Santucci, and Kenworthy (2006). "Santa Monica Mountains National Recreation Area", page 67.
3. "Hunt, ReBecca K.; Santucci, Vincent L.; and Kenworthy, Jason (2006). "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands. New Mexico Museum of Natural History and Science Bulletin 34, pp. 63–69" (PDF). Archived from the original (PDF) on 2013-10-19. Retrieved 2015-11-16.
4. Sorlien, Christopher C.; Seeber, Leonardo; Broderick, Kris G.; Luyendyk, Bruce P.; Fisher, Michael A.; Sliter, Ray W.; Normark, William R. (June 2013). "The Palos Verdes anticlinorium along the Los Angeles, California coast: Implications for underlying thrust faulting". Geochemistry, Geophysics, Geosystems. 14 (6): 1866–1890. Bibcode:2013GGG....14.1866S. doi:10.1002/ggge.20112.
5. Blake, Gregg H. 1991. "Review of the Neogene biostratigraphy and stratigraphy of the Los Angeles Basin and implications for basin evolution," In: Biddle, Kevin T. (ed), "Active Margin Basins", AAPG Memoir 52, 319pp.