Rosario Group

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Rosario Group
Stratigraphic range: Late Cretaceous
Type Group
Sub-units Lusardi Formation
Cabrillo Formation
Point Loma Formation
UnderliesTertiary andesites, Quaternary deposits
Overlies Mesozoic volcanic rocks
Thickness1,200 m (3,900 ft)
Lithology
PrimaryMarine mudstones, sandstones, conglomerates
Location
Region Baja California, California
Country Mexico, United States
Type section
Named for El Rosario, Baja California

The Rosario Group is a Late Cretaceous geologic group in southwestern California (United States) and northwestern Baja California (Mexico). In older literature it was named Rosario Formation. [1]

Contents

The Cretaceous aged formations of the Rosario Group include the Point Loma Formation, Cabrillo Formation and Lusardi Formation, in ascending order. [2]

The sedimentary structures of the Rosario Group apparently were formed in a nearshore shelf environment, probably a local embayment.

Fossils

Some incomplete dinosaur fossils have been discovered in the Point Loma Formation dating back to the Cretaceous period of the Mesozoic Era. [3]

See also

References

  1. ↑ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.
  2. ↑ Michael P. Kennedy; George W. Moore (1971). "Stratigraphic Relations of Upper Cretaceous and Eocene Formations, San Diego Coastal Area, California". AAPG Bulletin . 55 (5): 709–722, 709–722. doi:10.1306/819A3C5A-16C5-11D7-8645000102C1865D. ISSN   0149-1423. Wikidata   Q108701240.
  3. ↑ Morris, William J. (1973). "A Review of Pacific Coast Hadrosaurs". Journal of Paleontology. 47 (3): 551–561. ISSN   0022-3360.

Further reading


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