The Arcadia Park Shale is a geologic formation within the Eagle Ford Group that outcrops in the northern portion of East Texas.
[2] It was originally described by W. L. Moreman from outcrops near the former Arcadia Park railway station west of downtown Dallas, where it is 100 ft (30 m) thick.
[1] In the type area there is an unconformity between the Arcadia Park and the underlying Britton Formation.
[3] The Kamp Ranch Limestone is made up of broken pieces (prisms) of Inoceramus clams, and also contains shark's teeth.
The shale overlying the Bells Sandstone has been named the Maribel Shale[5] Fossils that occur in the Arcadia Park include shark's teeth and other fish remains, ammonites, inoceramid clams, oysters, and foraminifera.