Group of late Mesozoic formations in the Central Valley of California
Great Valley Sequence
Stratigraphic range: Late Jurassic through Cretaceous
Geologic map showing location of the Great Valley Sequence. Modified from Irwin (1990)[1]
Type
Sedimentary
Underlies
Cenozoic sedimentary fill
Overlies
Basement
Thickness
up to 40,000 feet (12 km)[2]
Lithology
Primary
shale and sandstone
Other
minor conglomerate
Location
Region
Great Valley-Central Valley of California
Country
United States
Type section
Named for
Great Valley-(Central Valley) of California
Named by
Baily, Irwin & Jones (1964)[2]
Turbidites in the Venado Sandstone (Great Valley Sequence) at Lake Berryessa, California.
The Great Valley Sequence of California is a 40,000-foot (12 km)-thick group of related geologic formations that are Late Jurassic through Cretaceous in age (150–65 Ma) on the geologic time scale. These sedimentary rocks were deposited during the late Mesozoic Era in an ancient seaway that corresponds roughly to the outline of the modern Great Valley (Central Valley) of California.
^map is modified from figure 3.3, p. 62-63 in Irwin (1990)
^ abCite error: The named reference bull183 was invoked but never defined (see the help page).
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