Carlile Shale
| 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 |
| 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.
It is composed of marine deposits of the Cretaceous Seaway of the Western Interior. In some regions it overlies the Greenhorn Formation, and underlies the Niobrara Formation.
Upper Turonian series Plesiosaur remains are among the fossils that have been recovered from its strata from its Blue Hill Shale Member in Kansas.
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Wikipedia