The Quartermaster Formation is a geologic formation in Texas. It preserves fossils dating back to the Permian period.Quartermaster Formation at Fossilworks.org
See also List of fossiliferous stratigraphic units in Texas Paleontology in Texas
References
Further reading R. Roth, N.D. Newell, and B.H. Burma. 1941. Permian pelecypods in the lower Quartermaster Formation, Texas. Journal of Paleontology 15(3):312-317