M Mackenzie, Colonel Ranald: 3 mammals: 27 Marcy, Captain R. B.: 6 mass-wasting: 31 mastodon, shovel-jawed: 27 mechanical weathering: 30 metamorphic rocks: 10 mortar hole: 25 O Observation Point: 33 Ogallala Formation: 21, 23-27, 42 opal: 26 oxidation: 31 P Paleozoic Era: 13 Palo Duro Canyon State Park: 7, 14, 45 Panhandle-Plains Historical Museum: 2, 27, 45-46 Park Entrance: 33 park history: 3-8 Park Road 5: 33, 38, 50 Parker, Chief Quanah: 7 Pecos River: 8 pedestal rock: 25 petrified wood: 22 photography: 43 phytosaurs: 22 picnicking and camping: 43 Pioneer Amphitheatre: 33-34 Plains Indians: 3 Pleistocene rocks: 28 time: 3 Pliocene Epoch: 27 Prairie Dog Town Fork of the Red River: 1, 29, 39 Precambrian rocks: 13 principle of superposition: 13 Proterozoic rocks: 13 psilomelane: 22 Q Quartermaster Formation: 12, 17-19, 20, 21, 31, 36, 37, 42, 44 R Red River: 8, 29 reduction halos: 19, 20 ripple marks: 19 Rock Garden, The: 23, 40, 43 Rocky Mountains: 24 S saber-tooth cat: 27 Sad Monkey, Texas: 36 Railroad: 6, 20, 23, 35 Santana’s Face: 23, 37, 38 satin spar: 17 Scenic Drive, The: 33 sedimentary rocks: 10 sediments: 10 selenite: 17 septaria: 22 septarian concretions: 22 shovel-jawed mastodon: 27 Sky Ride, The: 37 Sleeping Indian: 40, 42 sloths: 27 siliceous rocks: 27 solution: 29 Spanish Skirts: 19, 37 suffosian: 19 Sunday Canyon: 40 superposition, principle of: 13 suspension: 29 synclines: 18 T talus: 31 talus slopes: 31 Tecovas Formation: 19-22, 36, 37, 42, 44 Texas Panhandle: 9 Texas Panhandle Heritage Foundation, Inc.: 35 Texas Parks and Wildlife Department: 2 Texas-Santa Fe Expedition: 6 Timber Mesa: 1, 23, 37, 38 time scale, geologic: 11, 12 tortoises: 27 Triassic Peak: 1, 35 Trujillo Formation: 20, 21, 22-23, 36, 38, 42, 43 Turnaround, The: 1, 41, 44 U unconformities: 21 W water crossings: 39 weathering: 30 West Texas State University: 45 Wolfin, Charles A.: 1 Footnotes [1]Professor of Geology, Lamar State College of Technology, Beaumont, Texas. [2]Entries marked with asterisk are published by the Bureau of Economic Geology, The University of Texas at Austin. Those not out of print are distributed at nominal sale price; list sent on request. [Illustration: Cover image, Aerial view of Palo Duro Canyon] Transcriber’s Notes --This book, published without copyright notice, is in the public domain. --Silently corrected a few palpable typos.