| Ingersoll Shale | |
| Type: | Informal unit |
| Age: | Santonian ~ |
| Period: | Santonian |
| Prilithology: | Claystone |
| Otherlithology: | Sandstone |
| Region: | Russell County, Alabama |
| Coordinates: | 32.5°N -85°W |
| Paleocoordinates: | 32.4°N -54.2°W |
| Unitof: | Eutaw Formation |
| Thickness: | 90cm (40inches) |
| Extent: | <30m (100feet) |
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]
The Ingersoll Shale consists of a clay-dominated lens, asymmetrical in cross-section, with a maximum thickness of 90cm (40inches) and a width estimated to be less than 30m (100feet).