Carlile Formation

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Carlile Formation
Stratigraphic range: Turonian
Upper/Late Cretaceous, ~89.8–93.9 Ma
Type Geological formation
Unit of Colorado Group (lower); or
Benton Formation
Sub-units Codell Sandstone
Blue Hill Shale
Fairport Chalk
Underlies Niobrara Formation
Overlies Greenhorn Formation
Thickness 170–230 feet (52–70 m)
Lithology
Primary shale, chalky to carbonaceous
Other limestone
sandstone
siltstone
septarians
bentonite
Location
Region mid-continental
Country United States
Type section
Named for Carlile Spring and Carlile Station, 21 mi west of Pueblo, Colorado[1]
Named by Gilbert, 1896

The Carlile Formation is a Turonian age Upper/Late Cretaceous series shale geologic formation in the central-western United States, including in the Great Plains region of Colorado, Kansas, Nebraska, New Mexico, North Dakota, South Dakota, and Wyoming.[2]

It is composed of marine deposits of the Cretaceous Seaway of the Western Interior.[3] In some regions it overlies the Greenhorn Formation, and underlies the Niobrara Formation.

Fossils

Upper Turonian series Plesiosaur remains are among the fossils that have been recovered from its strata from its Blue Hill Shale Member in Kansas.[4]


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