BUREAU OF ECONOMIC GEOLOGY The University of Texas at Austin Peter T. Flawn, Director Introduction 1 Acknowledgments 2 Park history 3 Ancient man in Palo Duro Canyon 3 Indians of the Plains 3 Advent of the White Man 3 Regional setting 8 The geologic story 10 The canyon’s rocks and minerals 10 Unraveling earth history 10 The geologic column and geologic time scale 12 Geologic formations exposed in Palo Duro Canyon 16 Quartermaster Formation 17 Tecovas Formation 19 Trujillo Formation 22 Ogallala Formation 23 Rocks of the Pleistocene 28 How the canyon was carved 29 The geologic work of running water 29 Weathering and gravity add the final touch 30 Weathering 30 Mass-wasting 31 Differential ero…
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