| 词条 | Topanga Canyon Formation |
| 释义 |
| name = Topanga Canyon Formation | image = | caption = | type = Formation | age = Neogene | period = Neogene | prilithology = | otherlithology = | namedfor = | namedby = | region = Santa Monica Mountains Los Angeles County, California | country = United States | coordinates = | unitof = | subunits = | underlies =Modelo Formation | overlies = | thickness = | extent = | area = | map = | map_caption = }} The Topanga Canyon Formation is a Miocene epoch geologic formation in the Santa Monica Mountains, Simi Hills, Santa Ana Mountains and San Joaquin Hills, in Los Angeles County, Ventura County, and Orange County, southern California.[1] It is primarily composed of hard sandstone with some inter-bedded siltstone. FossilsIt preserves fossils dating back to the Miocene epoch of the Neogene period, during the Cenozoic Era.[2][3] See also{{Portal|Neogene|California|Paleontology|Cenozoic|Earth sciences}}
References1. ^USGS.gov: "Preliminary Geologic Map of the Simi 7.5' Quadrangle, Southern California, A Digital Database"; Open-File Report 97-259; compiled by R.F. Yerkes and R.H. Campbell; 1997. {{Clear}}{{California-geologic-formation-stub}}{{Neogene-stub}}2. ^{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= Various Contributors to the Paleobiology Database|url= http://www.fossilworks.org/|accessdate= 8 July 2014|deadurl= yes|archiveurl= https://web.archive.org/web/20140731140924/http://fossilworks.org/|archivedate= 31 July 2014|df= }} 3. ^http://research.nhm.org/ip/topanga-formation/ 8 : Miocene California|Geology of Los Angeles County, California|Geology of Ventura County, California|Miocene geology|Santa Monica Mountains|Simi Hills|Topanga, California|Geologic formations of California |
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