Walnut Formation
From Wikipedia, the free encyclopedia
| Walnut Formation | |
|---|---|
| Stratigraphic range: Cretaceous | |
| Type | Formation |
| Location | |
| Region | Texas, Oklahoma |
| Country | United States |
The Walnut Formation is a geologic formation from the Albian Stage stretching from central Texas to southern Oklahoma. It is part of the Fredericksburg Group. The formation preserves fossils dating back to the Cretaceous period, notably marine invertebrates Exogyra texana, Gryphaea marcoui, and Carseyella walnutensis.[1][2][3]
