The Grayburg Formation is a geologic formation in west Texas and southern New Mexico. It preserves fossils dating back to the Guadalupian Epoch of the Permian Period.
The Grayburg Formation is a geologic formation in west Texas and southern New Mexico. It preserves fossils dating back to the Guadalupian Epoch of the Permian Period. (en)
The Grayburg Formation is a geologic formation in west Texas and southern New Mexico. It preserves fossils dating back to the Guadalupian Epoch of the Permian Period. (en)