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Santa Susana Formation

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Santa Susana Formation
Stratigraphic range: Late Paleocene to Early Eocene of Paleogene
TypeFormation
UnderliesMeganos Formation
OverliesMartinez Formation
Thickness1,000–1,500 feet (300–460 m)
Location
RegionLos Angeles County and Ventura County, California
CountryUnited States
ExtentSimi Hills, Santa Susana Mountains
Type section
Named forSanta Susana, California

The Santa Susana Formation is a Paleogene period geologic formation in the Simi Hills and western Santa Susana Mountains of southern California.[1][2][3]

The formation consists largely of light-gray shale and some fine-grained shaly sandstone, with a lense of heavy conglomerates in the lower part.[1][4] It is from 1,000–1,500 feet (300–460 m) thick.[1][4]

Fossils

The Santa Susana Formation preserves fossils from the Late Paleocene to Early Eocene epochs in the Paleogene period of the Cenozoic Era.[4][5] Fossilized fauna in the Santa Susana Formation is entirely different from that of underlying Martinez Formation, and has very little in common with that of the overlying Meganos Formation.[1][3][6]

See also

References

  1. ^ a b c d USGS.gov: Geolex - Santa Susana Formation; accessed 8.15.2015
  2. ^ "A summary of work in progress on the Tertiary and Quaternary of western North America"; Clark, B.L.; Pan-Pacific [2nd] Science Congress Proceedings, Australia, v. 1, p. 874-879 (1924); accessed 8.15.2015.
  3. ^ a b "A contribution to the paleontology of the Martinez Eocene of California"; Nelson, R. N.; University of California Publications in Geological Sciences v. 15, no. 11 (1925); [p. 397-466]; accessed 8.15.2015.
  4. ^ a b c USGS.gov: "Preliminary geologic map of the Santa Susana quadrangle, Southern California"; R. F. Yerkes1 and R. H. Campbell; accessed 8.15.2015.
  5. ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 8 July 2014. {{cite web}}: |author= has generic name (help)
  6. ^ "Checklist of California Tertiary marine Mollusca"; Keen, A.M., and Bentson, Herdis; Geological Society of America Special Paper, 56, 280 p. (1944); [Pg. 21 (fig. 4) shows age as [late] Paleocene through early Eocene]; accessed 8.15.2015.


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