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Ingersoll Shale

Coordinates: 32°30′N 85°00′W / 32.5°N 85.0°W / 32.5; -85.0
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Ingersoll Shale
Stratigraphic range: Santonian
~86–85 Ma
TypeInformal unit
Unit ofEutaw Formation
Thickness90 cm (35 in)
Lithology
PrimaryClaystone
OtherSandstone
Location
Coordinates32°30′N 85°00′W / 32.5°N 85.0°W / 32.5; -85.0
Approximate paleocoordinates32°24′N 54°12′W / 32.4°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)

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

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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

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  1. ^ Knight et al., 2011
  2. ^ Ingersoll Shale at Fossilworks.org

Bibliography

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  • Knight, Terrell K.; Bingham, P. Sean; Lewis, Ronald D.; Savrda, Charles E. (2011), "Feathers of the Ingersoll shale, Eutaw Formation (Upper Cretaceous), eastern Alabama: The largest collection of feathers from North American Mesozoic rocks" (PDF), PALAIOS, 26 (6): 364–376, Bibcode:2011Palai..26..364K, doi:10.2110/palo.2010.p10-091r