Cabrillo Formation Explained

Cabrillo Formation
Type:	Geological formation
Age:	Maastrichtian stage, Late Cretaceous Epoch
Period:	Maastrichtian
Prilithology:	sandstones, conglomerates
Namedfor:	Cabrillo National Monument
Namedby:	Kennedy and Moore, 1971^[1]
Region:	North America
Country:	United States
Unitof:	Rosario Group
Overlies:	Point Loma Formation
Extent:	Point Loma and Mount Soledad, San Diego County California

The Cabrillo Formation is a Maastrichtian stage geologic formation in coastal San Diego County, southern California. It is part of the Rosario Group.^[2] The Maastrichtian stage is of the Late Cretaceous Epoch, during the Mesozoic Era.

The formation is found on the eastern and southwestern sides of the Point Loma peninsula including in Cabrillo National Monument, and on Mount Soledad, both within the city of San Diego.^{[2] [3]}

The Cabrillo Formation overlies the Point Loma Formation.

Fossils

A single tooth from the cartilaginous fish Squalicorax has been recovered from the Cabrillo Formation sediments of Cabrillo National Monument.^[4]

Further reading

• Book: Kennedy, Michael P. . 1975 . Geology of the San Diego metropolitan area, California . California Division of Mines and Geology .

Notes and References

1. Kennedy, M.P., and Moore, G.W., 1971, Stratigraphic relations of Upper Cretaceous and Eocene formations, San Diego coastal area, California: American Association of Petroleum Geologists Bulletin, v. 55, no. 5, p. 709-722. article
2. "Cabrillo National Park," Hunt, Santucci, and Kenworthy (2006); page 65.
3. Web site: General Plan Final Program EIR: 3.11 Paleontological Resources . City of San Diego.
4. Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 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.