Geology of the Grosvenor quadrangle, Brown and Coleman Counties, Texas Pennsylvanian and lower Permian stratigraphy between the Brazos and Colorado rivers, north-central Texas Pennsylvanian, Permian stratigraphy, north-central Texas Terriere, Robert T. 1926- creator author. Geological Survey (U.S.) issuing body. text bibliography dcu 1960 monographic eng remote 1 online resource (iv, 35 pages, 3 pages of plates) : illustrations, maps, charts. by Robert T. Terriere. Title from title screen (viewed July 23, 2014). Includes bibliographical references (pages 34-35). n-us-tx Geology Texas Brown County Geology Texas Coleman County Geology, Stratigraphic Pennsylvanian Geology, Stratigraphic Permian Geology Geology, Stratigraphic Pennsylvanian Geologic Period Permian Geologic Period Texas Brown County Texas Coleman County From 230 to 310 million years ago fast I 19.3:1096-A I 19.3:1096-A Geology of the Grosvenor quadrangle, Brown and Coleman Counties, Texas Terriere, Robert T. (OCoLC)2812911 Geological Survey bulletin ; 1096-A https://purl.fdlp.gov/GPO/gpo71572 COP 140802 20211120180458.0 in00003732657 eng