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Tulare Formation
Stratigraphic range: Neogene & Quaternary
Type Formation
Underlies(is topmost formation)
Overlies San Joaquin Formation
Thicknessup to 4,000 feet (1,200 m)
Location
Region San Joaquin Valley, California
Country United States

The Tulare Formation ( /tʊˈlɛəri/ ⓘ) is a Pliocene to Holocene epoch geologic formation in the central and southern San Joaquin Valley of central California. [1] [2]

Geology

It overlies the San Joaquin Formation, and can be up to 4,000 feet (1,200 m) thick. [1] [2]

Its sediments consist mainly of unconsolidated deposits of clay, silt, sand, and gravel. [1]

Fossils

Many freshwater fossils are preserved in the formation, dating back to the Neogene and Quaternary Periods of the Cenozoic Era. [3] They include the largest fossil assemblage of clams and snails known on the Pacific Coast. [1]

See also

References

  1. ^ a b c d USGS.gov: "Geology of the Tulare Formation and other continental deposits, Kettleman City area, San Joaquin Valley, California, with a section on ground-water management considerations and use of texture maps"; Water-Resources Investigations Report 83-4000; by R.W. Page; 1983.
  2. ^ a b USGS.gov: "Neogene Gas Total Petroleum System—Neogene Nonassociated Gas Assessment Unit of the San Joaquin Basin Province"; Chapter 22 of the Petroleum Systems and Geologic Assessment of Oil and Gas in the San Joaquin Basin Province, California; by Allegra Hosford Scheirer and Leslie B. Magoon.
  3. ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.


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