It preserves fossils dating back to the early Cretaceous period.

[3] It rests conformably on the U-Bar Formation[2] and is unconformably overlain by the Cowboy Spring Formation.The total thickness is 5,150–7,800 feet (1,570–2,380 m).

Lucas and his coinvestigators assigned the formation to the Bisbee Group and divided it into the Fryingpan Spring, Sarten, Beartooth, and Rattlesnake Ridge members.

[6] The formation contains fossil mollusks such as gastropods, ammonites, and pelecypod,[2] foraminifera, and scaphopods.

[2] In 1998, Lucas and coinvestigators assigned the formation to the Bisbee Group and divided it into the Fryingpan Spring, Sarten, Beartooth, and Rattlesnake Ridge members.