Ingersoll Shale | |
---|---|
Stratigraphic range: Santonian ~ | |
Type | Informal unit |
Unit of | Eutaw Formation |
Thickness | 90 cm (35 in) |
Lithology | |
Primary | Claystone |
Other | Sandstone |
Location | |
Coordinates | 32°30′N 85°00′W / 32.5°N 85.0°W |
Approximate paleocoordinates | ![]() |
Extent | <30 m (98 ft) |
The Ingersoll Shale is a Late Cretaceous (Santonian) informal geological unit in eastern Alabama. Fourteen theropod feathers assigned to birds and possibly dromaeosaurids have been recovered from the unit.[1][2]
Description
The Ingersoll Shale consists of a clay-dominated lens, asymmetrical in cross-section, with a maximum thickness of 90 centimetres (35 in) and a width estimated to be less than 30 metres (98 ft).
References
- ^ Knight et al., 2011
- ^ Ingersoll Shale at Fossilworks.org
Bibliography
- Knight, Terrell K.; P. Sean Bingham; Ronald D. Lewis, and Charles E. Savrda. 2011. Feathers of the Ingersoll shale, Eutaw Formation (Upper Cretaceous), eastern Alabama: The largest collection of feathers from North American Mesozoic rocks. PALAIOS 26. 364–376. . doi:10.2110/palo.2010.p10-091r
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