Type Formation Thickness 1,200 m Primary Sandstone, Conglomerate | Country Mexico, United States Named for El Rosario | |
Sub-units Cabrillo Formation
Point Loma Formation Underlies Tertiary andesites, Quaternary deposits Overlies Mesozoic volcanic rocks Regions Baja California, California | ||
The Rosario Formation or Rosario Group is a Late Cretaceous epoch geologic formation in southwestern California (U.S.) and northwestern Baja California (México).
The Rosario Group includes the Point Loma Formation and Cabrillo Formation subunits in San Diego County, California.
The sedimentary structures of the Rosario Formation apparently were formed in a nearshore shelf environment, probably a local embayment.
Fossils
It preserves fossils dating back to the Cretaceous period of the Mesozoic Era.
References
Rosario Formation Wikipedia(Text) CC BY-SA