G [geodes]: [22] geologic column: [12] [geologic time scale]: [11], [12] geomorphologist: [29] Goodnight, Colonel Charles: [1], [39], [40] [gypsum]: [17]
H Harper, Mrs. Ples: [35] hematite: [22] Hester, W. A.: [1] High Plains: [8] hiking: [43] history of park: [3]-8 “[hoodoos]”: [23], [31] Horn, Ron: [35] horseback riding: [43] horses: [27] hydration: [18], [31] hydraulic action: [30]
I [Ice Age]: [3] [igneous rocks]: [10] Indian campground: [39] Indians of the Plains: [3]
J JA Ranch: [6]
L Lighthouse, The: [23], [25], [39], [41] Little Sunday Canyon: [39] Llano Estacado: [8]
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]