Fernando Formation Explained

Fernando Formation
Type:	Geologic formation
Age:	Plio-Pleistocene
Period:	Pleistocene
Prilithology:	Mudstone, siltstone, sandstone
Region:	Los Angeles Basin, Santa Monica Mountains Los Angeles County, California
Country:	United States
Underlies:	Pico Formation
Overlies:	Repetto Formation

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]

Notes and References

1. http://archives.datapages.com/data/pac_sepm/109/109001/pdfs/349.htm Liddicoat, 2001
2. Hunt, Santucci, and Kenworthy (2006). "Santa Monica Mountains National Recreation Area", page 67.
3. Web site: 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. . 2015-11-16 . 2013-10-19 . https://web.archive.org/web/20131019162649/http://www.nature.nps.gov/geology/paleontology/pub/fossil_conference_7/8%20Hunt%202.pdf . dead .
4. Sorlien . Christopher C. . Seeber . Leonardo . Broderick . Kris G. . Luyendyk . Bruce P. . Fisher . Michael A. . Sliter . Ray W. . Normark . William R. . The Palos Verdes anticlinorium along the Los Angeles, California coast: Implications for underlying thrust faulting . Geochemistry, Geophysics, Geosystems . June 2013 . 14 . 6 . 1866–1890 . 10.1002/ggge.20112. 2013GGG....14.1866S .
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.