Arroyo Formation
Videos
The Arroyo Formation, sometimes termed the Lower Clear Fork Formation, is a geologic formation in Texas. It preserves fossils dating back to the Kungurian stage of the Permian period. It is the lower-
A skeleton of Dimetrodon grandis found at the Craddock bonebed on display at the National Museum of Natural History
Brachydectes
Diplocaulus
Pelodosotis
The Red Beds of Texas and Oklahoma are a group of Early Permian-age geologic strata in the southwestern United States cropping out in north-central Texas and south-central Oklahoma. They comprise seve
Arroyo Formation
…It is the lower-most portion of the Clear Fork Group, part of a series of fossiliferous Permian strata in the south-central United States known as the red beds. The Arroyo Formation is the oldest and most eastern component of the Clear Fork Group. It extends in a Northeasterly direction from Concho County up…
Artist's rendering of Edaphosaurus pogonias and Platyhystrix
Edaphosaurus boanerges fossil skeleton from Archer County, on display in Harvard Museum of Natural History
Seymouria baylorensis skeleton