The Ingersoll Shale is a

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...

(

Santonian The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya (million years ago) and 83.6 ± 0.7 mya. The ...

) informal geological unit in eastern Alabama. Fourteen theropod feathers assigned to birds and possibly

dromaeosaurids Dromaeosauridae () is a family of feathered theropod dinosaurs. They were generally small to medium-sized feathered carnivores that flourished in the Cretaceous Period. The name Dromaeosauridae means 'running lizards', from Greek ('), meaning ...

have been recovered from the unit.Knight et al., 2011Ingersoll Shale
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...

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Description

The Ingersoll Shale consists of a clay-dominated lens, asymmetrical in cross-section, with a maximum thickness of and a width estimated to be less than .

References

Bibliography

* {{doi, 10.2110/palo.2010.p10-091r Upper Cretaceous Series of North America Cretaceous Alabama Santonian Stage Shale formations of the United States Sandstone formations of the United States Tidal deposits Lagerstätten Fossiliferous stratigraphic units of North America Paleontology in Alabama