Pg. 387, 392. Clear Creek bed in Canyon division. To south of the Gulf, Colorado and Santa Fe RR, practically all limestone; to north of RR contains considerable clay and in places is divided by 20 to 50 feet of clay. Upper limestone 5 to 15 feet thick; lower limestone 25 to 75 feet thick. Fossiliferous (corals, echinoids, and brachiopods). Total thickness 20 to 140 feet. Member of Canyon division [Canyon is 3rd from top of 5 Carboniferous divisions of Cummins, 1891]. Underlies Bed No. 7 (25 to 100 feet of clay) and overlies Cedarton bed. Age is Pennsylvanian.
[Named from Clear Creek, Brown Co., Colorado River region, central TX.]

Source: Publication; US geologic names lexicon (USGS Bull. 896, p. 458-459).

Pg. 24, 31, 35; Univ. Texas Bull., no. 2132, p. 109, 111, 113, 115. Clear Creek limestone, 10 to 25 feet thick, is a member of Brad formation in Colorado River Valley, Colorado River region, central Texas. Underlies Placid shale and overlies Cedarton shale and sandstone; all members of Brad formation. West of Brownwood and along its outcrop across Brown County it is a yellow-brown limestone made up of several more or less discontinuous layers which in places combine to form a solid ledge, but in other places are separated by thin beds of shale. In places it can be distinguished by its dark yellow-brown color; in other places it is light gray and massively bedded. [Age is Pennsylvanian.]

Source: US geologic names lexicon (USGS Bull. 896, p. 458-459).