Malone Formation

One of the few geological formations in Texas dating to the Jurassic period, the Malone Formation unconformably overlies the Permian Briggs Formation, and laterally changes thickness dramatically from 45 meters on the east side to 325 meters in the northwest part of the Malone Mountains. It has been split into two subdivisions: a lower member containing Idoceras suggesting a Kimmeridgian age, and an upper member containing Kossmatia indicating a Tithonian age. ==Fossil content==

Vertebrates Remains of vertebrates in this formation are rare and mostly poorly-preserved. Two cycloid fish scales, a pycnodont tooth and bone fragments of 'enaliosaurs' (a classification now obsolete) have been reported from the Malone Formation, but are not well-described. Invertebrates Annelids Bivalves Bryozoans Cephalopods Corals Echinoderms Gastropods Plants Fossil remains of plants, including driftwood, are abundant in the Malone Formation, but not well preserved. ==See also==