Ingersoll Shale

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]

Ingersoll Shale
Stratigraphic range: Santonian
~
TypeInformal unit
Unit ofEutaw Formation
Thickness90 cm (35 in)
Lithology
PrimaryClaystone
OtherSandstone
Location
Coordinates32.5°N 85.0°W / 32.5; -85.0
Approximate paleocoordinates32.4°N 54.2°W / 32.4; -54.2
RegionRussell County, Alabama
Country United States
Extent<30 m (98 ft)
Ingersoll Shale is located in the United States
Ingersoll Shale
Ingersoll Shale (the United States)
Ingersoll Shale is located in Alabama
Ingersoll Shale
Ingersoll Shale (Alabama)

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

  1. Knight et al., 2011
  2. 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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