{{Short description|Eocene Epoch geologic formation in California}} {{Infobox rockunit | name = Martinez Formation | image = | caption = | type = Geologic formation | age = Eocene | period = Eocene | prilithology = | otherlithology = | namedfor = | namedby = | region = California | country = United States | coordinates = | unitof = | subunits = | underlies = Tejon Formation (regionally),<br />Ione Formation (regionally) | overlies = Chico Formation | thickness = | extent = | area = | map = | map_caption = }}
The '''Martinez Formation''' is an Eocene Epoch geologic formation in California.
==Geology== The formation regionally overlies the Chico Formation and regionally underlies the Tejon Formation or the Ione Formation.
It is exposed in the Clevelin Hills in Riverside County, Santa Ana Mountains in Orange County, northwestern Santa Monica Mountains near Calabasas (California) in Los Angeles County, and north of Mount Diablo/south of the Sacramento Delta in Contra Costa County.<ref>[https://books.google.com/books?id=s84QAAAAIAAJ&dq=Martinez+Formation&pg=PA6 Google Books: "The stratigraphic and faunal relations of the Martinez formation to the Chico and Tejon of Southern California"], Clarence A. Waring; Stanford University Dept. of Geology; Jun 4, 2011 . accessed 1.16.2016.</ref>
===Fossils=== The formation preserves fossils dating back to the Paleogene period.<ref>{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= ((Various Contributors to the Paleobiology Database))|url= https://www.fossilworks.org/|access-date= 17 December 2021|archive-date= 25 March 2022|archive-url= https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home|url-status= dead}}</ref>
==See also== {{Portal|California|Paleontology}} * List of fossiliferous stratigraphic units in California * {{C|Paleogene California}} * Paleontology in California
== References == {{Reflist}}
Category:Geologic formations of California Category:Paleogene California Category:Eocene Series of North America Category:Geology of Contra Costa County, California Category:Geology of Los Angeles County, California Category:Geology of Orange County, California Category:Geology of Riverside County, California Category:Natural history of the Santa Monica Mountains Category:Santa Ana Mountains
{{California-geologic-formation-stub}} {{Paleogene-stub}}