The Crosswicks Clay is a
geologic formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...
in
Delaware
Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
. It preserves
fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
dating back to the
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...
period.
See also
*
List of fossiliferous stratigraphic units in Delaware
This article contains a list of fossil-bearing stratigraphic units in the state of Delaware, U.S.
Sites
See also
* Paleontology in Delaware
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Delaware
Delaware
Stratigraph ...
*
Paleontology in Delaware
References
*
Cretaceous Delaware
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