Index
[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] X [Y] [Z]
A acid: [18], [22] acid tests (see also [chemical tests]): [18] actinolite: [82] schist: [87] [agate]: [21], [83] agatized wood: [20], [84] age, earth’s crust: [2] alabaster: [65] albite: [55] alkali lakes: [66], [83] Allamoore: [87], [93] alloys: [52] almandite: [58] Alpine: [57], [78], [82], [90] Altuda Mountain: [57], [90] amalgam: [51] amazonstone: [56] amethyst: [37], [82] Amethyst Hill: [82] amorphous minerals, definition of: [15] amphibole asbestos: [29], [33], [34], [44] Anderson County: [70] Andrews County: [83] Angelina County: [52] anhydrite: [28], [29], [30], [35], [36], [43], [65], [66], [91] anthophyllite: [93] antigorite: [87] Apache Mountains: [65] apatite: [72] Archer County: [52] argentite: [26], [27], [89], [90] argentiferous galena: [57], [90] Armstrong County: [79] asbestos: [43] amphibole: [29], [33], [34], [44] chrysotile: [44], [87] ash, volcanic: [41], [97] augite: [45] Austin: [46], [62] autunite: [97] azurite: [35], [52], [53], [54]
B Babyhead: [72] Balcones fault zone: [10], [42], [45], [88] Bandera County: [45] Baringer Hill pegmatite: [80] barite: [15], [28], [31], [32], [35], [36], [38], [44], [48] barium: [45] Barrilla Mountains: [85] Baylor County: [45], [52], [98] basal cleavage: [76], [93], [94] basalt: [40], [41], [45] basement: [2], [9] Bastrop County: [64] Bell County: [69] bentonite: [51], [52] beryllium: [80] Big Bend area: [9], [42], [51], [75], [77] Big Branch Gneiss: [59] [biotite]: [32], [33], [34], [76] Bird mine: [90] Blanco County: [44], [58], [59], [61], [70], [83], [87], [94] black mica (see [biotite]) [blast furnace]: [70], [71] blast sand: [86] bleaching clay: [51] blue copper: [53] Boerne: [18] Boling salt dome: [91] books about rocks and minerals: [24], [39], [100] brass: [52] braunite: [26], [27], [73] Brazoria County: [91] Brazos County: [98] Brazos River, Double Mountain Fork and Salt Fork of: [43] breccia: [12], [41], [81] Brewster County: [45], [46], [47], [49], [50], [57], [65], [70], [76], [77], [78], [82], [84], [85], [90] brimstone: [90] bronze: [52] Brooks County: [64] Brown, Thomas E.: [vii] Brown County: [45], [49] brown iron ore (see also [limonite]): [70] Bryan Mound salt dome: [91] building sand: [85] Burnet: [56], [80], [97] Burnet County: [18], [53], [54], [55], [56], [58], [59], [60], [61], [62], [63], [70], [76], [79], [80], [81], [82], [83], [97]
C calcareous sinter and tufa: [46] calcite: [7], [14], [18], [19], [20], [21], [28], [30], [31], [32], [34], [35], [36], [38], [45], [46], [49], [50], [51], [54], [56], [64], [68], [75], [86], [87], [88], [91] dog-tooth spar: [46], [47] Caldwell County: [88] caliche: [46], [47] Cambrian: [2], [3], [55], [58], [69], [86] Cameron County: [66] Capitan reef limestone: [1] Capitol building, Texas State: [62] cap-rock: [91], [92] carats: [60] carbon: [62], [63] carbonized wood: [20] carnotite: [30], [95], [97] Carrizo Mountains: [67], [83], [95] Casey, Miss Josephine: [vii] Cass County: [70] cassiterite: [27], [32], [47] Castile Gypsum: [91] Catahoula strata: [78], [86], [97] cave deposits: [18] caves: [18], [19], [49] Caverns of Sonora: [19] Cedar Lake: [83] Cedar Park: [70] celestite: [20], [28], [30], [35], [38], [48] cementing materials: [12], [46], [67], [70], [86] cerargyrite: [28], [29], [34], [37], [89], [90] cerium: [80] chalcedony (see also [agate]): [16], [21], [45], [78], [81], [83], [86] chalcocite: [21], [26], [27], [52], [54], [73], [89] chalcopyrite: [26], [52], [53], [54], [60] chalk: [40], 69 chemical elements: [7] chemical sediments: [12] [chemical tests]: [18], [43], [46], [47], [49], [52], [53], [54], [64], [68], [75] Cherokee County: [70] chert: [19], [40], [81], [84] chessylite: [53] china clay: [51] Chinati Mountains: [45], [57], [62], [85] Chisos Mountains: [45], [62], [85] chlorite: [93] schist: [87] chrysotile: [44], [87], [88] asbestos: [44], [87] cinnabar: [36], [49] clastic rocks: [12] clay: [40], [45], [49], [51], [70], [86], [88], [91] bentonite: [45], [51], [52] bleaching clay: [51] china clay: [51] kaolin: [51] clay minerals: [51] Clay County: [52] Clear Creek area: [63] cleavage: [17] basal: [76], [93], [94] cubic: [17], [57], [65] octahedral: [56], [57] pyramidal: [74] rhombohedral: [46], [54] Clemens salt dome: [91] Coal Creek serpentine: [87], [88] Coke County: [20], [49] Coleman County: [86] color of minerals: [16] columns: [18] Comal County; 45, [69] Comanche County: [49] common opal: [78] composition of minerals: [99] concretions: [19] conglomerate: [11], [12], [41], [55], [81] gneiss: [59] contact metamorphism: [13] copper: [52], [59], [90] blue copper: [53] glance: [52] green copper carbonate: [53] minerals: [52] pyrites: [53] yellow copper ore: [53] coquina: [41], [69] Crane County: [66] Cretaceous: [2], [3], [20], [21], [45], [46], [49], [51], [55], [57], [60], [65], [68], [69], [70], [74], [75], [84], [86], [88] cryptocrystalline quartz: [81], [84] crystal, definition of: [14] crystals, twinned: [46], [63] crystalline minerals, definition of: [14] Crosby County: [79] crust, earth’s: [2] cubic cleavage: [17], [57], [65] Culberson County: [1], [45], [52], [53], [58], [59], [60], [65], [75], [79], [83], [90], [91], [95]
D Daingerfield: [70] Dallas: [88] Damon Mound salt dome: [91] daughter elements: [95], [96] Davis Mountains: [45], [85], [98] Delaware Mountains: [65] diamond: [62] diatomaceous earth: [78] diatomite: [40], [78] Dickens County: [79], [98] Dietrich, John W.: [vii] dikes: [72], [79] dog-tooth spar: [46], [47] dolomite: [29], [30], [32], [36], [38], [40], [43], [54], [68], [75], [87], [88] dolomitic limestone: [68] Double Mountain Fork of the Brazos River: [43] double refraction: [46] dravite: [95] Duval County: [78], [83], [91], [97] dynamic metamorphism: [14]
E Eagle Flat: [93] Eagle Mountains: [56], [57], [90], [95] earth’s crust: [2] east Texas: [70] Ector County: [79] Edwards Limestone: [68], [69], [84] effervescence in acid: [18] El Capitan Peak: [1] elements: [7], [8], [95], [96] Ellenburger strata: [55], [84] El Paso: [48], [58], [85], [88] El Paso County: [48], [58], [62] epoch: [2] era: [2] erosion: [11] extrusive igneous rocks, definition of: [9]
F Fairland: [54] Falfurrias: [64] Fannett salt dome: [91] Fayette County: [52], [64], [84], [98] feldspar: [8], [29], [30], [31], [33], [34], [35], [37], [45], [51], [55], [59], [61], [72], [79], [80], [85], [86] albite: [55] amazonstone: [56] microline: [55], [56], [61] orthoclase: [55], [61] fibrous gypsum: [64], [65] filtering sand: [86] Fisher County: [20], [49], [58], [65] Flawn, Peter T.: [vii] flint: [84] flowstone: [18] flow structure: [85] [fluorite]: [29], [32], [34], [35], [37], [38], [56], [72] Foard County: [52], [58] foliation: [87] fool’s gold: [53], [80] formation: [6] Fort Bend County: [91] Fort Worth: [88] fracture of minerals: [17] fragmental rocks: [12] Franklin Mountains: [48], [58], [62], [85] Frasch method of sulfur mining: [91], [92] Fredonia: [67] Freer: [78], [83] furnace (see [blast furnace]; [open-hearth furnace])
G gabbro: [87] gneiss: [59] Gaines County: [83] galena: [17], [26], [57], [89], [90] argentiferous: [57], [90] Galveston County: [91] Gamble prospect: [67] gamma rays: [96] garnet: [31], [33], [34], [37], [58], [85], [87] Garza County: [97] Geiger counter: [96] gemstones: [56], [58], [77], [82], [94], [95] geode: [19], [46], [49], [82] geologic map: [4], 5 geologic time scale: [2], [3] geologists: [2] geology: [2] Gillespie County: [44], [45], [55], [58], [59], [60], [61], [65], [76], [80], [82], [83], [87], [88], [94] glass, natural: [9], [77], [85], [97] glass sand: [85]-86 glauconite: [70], [73] glossary: [102]-103 gneiss: [13], [41], [55], [56], [59], [67], [72], [73], [74], [76], [81], [87], [93], [97] conglomerate: [59] gabbro: [59] granite: [59] hornblende: [59] mica: [59] goethite: [70] gold: [26], [51], [59], [80], [90] fool’s: [53], [80] Gonzales County: [52], [84], [97] Grand Saline salt dome: [66] granite: [2], [8], [9], [13], [41], [48], [55], [56], [59], [61], [72], [76], [79], [81], [85], [87], [94], [95] gneiss: [59] opaline: [72] Granite Mountain: [62] Granite Shoals Lake: [56] granules: [85] graphite: [26], [27], [62], [75] schist: [63], [87] gravel: [12], [41], [91] green copper carbonate: [53] greensands: [70] Grit: [94] grossularite: [58] group: [6] Guadalupe Mountains, Peak: [1] Gulf Coast: [91] Gulf Coastal Plain: [20], [42], [43], [46], [51], [52], [58], [60], [65], [66], [78], [83], [84], [86], [87], [92], [97], [98] Gulf salt dome: [91] Gyp Hill salt dome: [64] gypsite: [65] gypsum: [28], [29], [30], [32], [36], [37], [43], [63], [70], [85], [91] alabaster: [65] fibrous gypsum: [64], [65] rock gypsum: [40], [65] rosettes: [63], [64] satin spar: [64] selenite: [63], [64], [76]
H [halite]: [28], [32], [34], [35], [36], [38], [40], [43], [65], [91] hand lens: [22] Hardeman County: [52], [58], [64], [65] hardness of minerals: [16], [99] Harris, Bill M.: [vii] Harris, John S.: [vii] Harris County: [65], [66] Hartley County: [79] Hays County: [45] Hazel Formation: [52] Hazel mine: [52], [53], [90] Heath mine: [60] hematite: [26], [27], [36], [66], [75], [84], [86] specular: [67] Henderson County: [70] High Island salt dome: [91] High Plains: [42], [46], [51], [65], [66], [78], [79], [83], [87], [97], [98] Hockley salt dome: [65], [66] hollandite: [26], [27], [28], [73], [74] Honey Creek area: [87] hornblende: [8], [59], [61] gneiss: [59] schist: [87] horn silver: [90] Hoskins Mound salt dome: [91] Houston: [70] Howard County: [45], [60] Hudspeth County: [45], [52], [53], [55], [56], [57], [58], [59], [60], [62], [65], [66], [67], [75], [79], [82], [83], [90], [93], [95] Humphreys, Alan: [vii] Hutchinson County: [66] hyalite: [78] hydrochloric acid (see also [chemical tests]): [18], [22]
I identification charts: [24] igneous rocks, definition of: [9] intrusive igneous rocks, definition of: [9] Irion County: [60] iron: [59], [66], [67], [69], [70], [72], [73] Iron Mountain: [73]
J Jackson strata: [97] jasper: [81], [84] Jasper County: [52] Jeff Davis County: [45], [51], [74], [78], [85] Jefferson County: [91] Johnson County: [69]
K kaolin: [51] kaolinite: [51] karats: [60] Karnes County: [97], [98] Katemcy: [94] Kendall County: [18] Kenedy County: [66] Kent County: [98] kidney ore: [67] King, Elbert A., Jr.: [vii] King County: [52] Kinney County: [45] Kleberg County: [66] Knox County: [52]
L labeling rock and mineral specimens: [23] labradorite: [45] Lake Buchanan: [80], [83] Lamb County: [79] Lampasas County: [20], [48], [49], [88] lava: [9] lead: [57], [90] Leakey: [51] Lee County: [64], [84] lens: [22] Liberty County: [91] lime: [69] limestone: [12], [13], [18], [19], [40], [43], [45], [46], [49], [54], [55], [56], [57], [58], [60], [68], [74], [75], [76], [84], [88], [90], [91] chalk: [69] dolomitic: [68] lithographic: [69] öolitic: [69] pulverulent: [41], [69] [limonite]: [19], [27], [28], [30], [32], [70], [75], [81], [86] lithographic limestone: [69] Live Oak County: [45], [97] llanite: [41], [71], [81] Llano: [60], [63], [72], [73], [95] Llano County: [44], [45], [55], [56], [58], [59], [60], [61], [63], [70], [71], [72], [73], [76], [78], [80], [83], [87], [88], [94], [95] Llano uplift: [10], [18], [42], [44], [52], [55], [56], [58], [59], [60], [61], [62], [63], [67], [70], [72], [76], [77], [79], [80], [82], [83], [84], [85], [86], [87], [88], [93], [94], [95] Lone Grove: [63] Lone Star: [70] Longhorn Cavern: [18] Long Point salt dome: [91] Lonsdale, John T.: [vii] luster of minerals: [16] Lytton Springs oil field: [88]
M Macon, James W.: [vii] magma: [9] magnesium, source of: [55] magnetite: [28], [67], [70], [72], [85], [87], [93] malachite: [34], [52], [53], [54] Malone Mountains: [65] manganese: [73], [75] map— geologic: [4]-5 physiographic outline: [42] Marathon area: [42], [84], [88] marble: [13], [14], [40], [46], [54], [75] Marble Falls: [62] Marion County: [70] martite: [67] Mason: [74] Mason County: [48], [55], [58], [59], [60], [61], [67], [72], [73], [74], [76], [80], [83], [94] masses, crystalline, definition of: [14] Matagorda County: [91] Mayfield prospect: [74] McCulloch County: [88] Medina County: [45] Menard County: [65] [mercury]: [8], [49], [50], [51] metamorphic rocks, definition of: [12] metamorphism, definition of: [13], [14] mica (see also [biotite]; [muscovite]): [8], [60], [61], [63], [64], [72], [76], [79], [80], [85], [87] mica gneiss and/or schist: [59], [76], [87] Mica Mine area: [58], [76], [77], [79] microcline: [55], [56], [61] milky quartz: [82] Mills County: [49] mineral identification charts: [24] mineralogists: [2] minerals, definition of: [7], [14], [15] Mississippian: [3], [55], [69], [88] Mitchell County: [66] Mohs scale of hardness: [16], [17] molybdenite: [63] montmorillonite: [51] Morris County: [70] moss agate: [84] Moss Bluff salt dome: [91] muriatic acid: [22] [muscovite]: [31], [32], [34], [37], [38], [76]
N Nacogdoches County: [70] Nash salt dome: [91] native elements: [8] native mercury: [8] native silver: [26], [89] nodule: [19], [44], [49] Nolan County: [20], [49], [63], [64], [65] north-central Texas: [43], [51], [52], [69], [70], [86], [88]
O Oakville strata: [97] obsidian: [40], [77] occurrence of minerals: [14] ocher, red: [67] octahedral cleavage: [56], [57] oil shale: [88] olivine: [88] onyx: [84] öolitic limestone: [69] opal: [21], [29], [30], [31], [35], [37], [38], [78], [86] opaline granite: [72] opalized wood: [20], [78], [84] [open-hearth furnace]: [70], [72] Orchard salt dome: [91] Ordovician: [3], [55], [69], [84] orthoclase: [55], [61]
P Packsaddle Mountain: [87] Packsaddle Schist: [87] Palangana salt dome: [91], [97] paleontologists: [2] parting of minerals: [17] Pavitte prospect: [53] Pecos County: [9] Pecos River: [65], [74], [75] pegmatite: [41], [55], [56], [58], [76], [77], [79], [81], [94], [95] Baringer Hill: [80] Pennsylvanian: [3], [45], [51], [55], [69], [70], [86], [88] peridotite: [88] period: [2] Permian: [1], [3], [20], [21], [43], [45], [49], [52], [55], [64], [65], [69], [86], [90] Permian basin: [42], [43], [65], [66] [petrified wood]: [20], [52], [78], [84] petrologists: [2] phenocrysts: [85] physiographic outline map: [42] pitchblende: [28], [95], [97] placer deposits: [60] Plata Verde mine: [90] Polk County: [98] porphyritic rocks: [45], [85] portland cement: [51], [69], [88] Precambrian: [2], [3], [44], [45], [48], [52], [53], [56], [58], [59], [60], [61], [63], [67], [72], [74], [75], [76], [79], [82], [85], [87], [93], [94], [95], [97] precious opal: [78] Presidio County: [45], [49], [57], [60], [62], [67], [77], [78], [84], [85], [90], [97] Presidio mine: [60], [90] properties of minerals: [14] pseudomorphs: [70], [87] pulverulent limestone: [41], [69] pumicite: [97], [98] pyramidal cleavage: [74] pyrite: [19], [26], [60], [70], [80], [87] pyrolusite: [27], [73], [74] pyroxene: [45]
Q quartz: [8], [20], [29], [30], [31], [33], [36], [37], [38], [48], [51], [54], [56], [59], [60], [61], [68], [72], [78], [79], [80], [81], [84], [85], [86], [94] agate: [21], [83], [84] amethyst: [37], [82] chalcedony: [16], [21], [45], [78], [81], [83], [86] chert: [19], [40], [81], [84] cryptocrystalline: [81], [84] jasper: [81], [84] milky: [82] onyx: [84] rock crystal: [82] rose: [82], [83] smoky: [82], [83] quartzite: [41], [74], [84], [86] Quaternary: [2], [3], [51], [79], [98] quicksilver (see also [mercury]): [50] Quitman Mountains: [57], [58], [60], [62], [67], [82], [90]
R radioactivity: [95], [96] Real County: [49], [51] Recent: [2], [3] “red beds”: [52] red ocher: [67] reef limestone: [1], [12] Reeves County: [65], [85], [91] reference books: [24], [39], [100] refraction, double: [46] rhombohedral cleavage: [46], [54] rhyolite: [40], [85] porphyry: [41], [85] Rio Grande: [83], [84], [97] rock— crystal: [82] gypsum: [40], [65] identification charts: [39] salt: [40], [65] units: [2] rocks, definition of: [8] Rodda, Peter U.: [vii] rose quartz: [82], [83] rosettes: [63], [64] Rustler Springs area: [91] rutile: [82]
S salt (see also [halite]): [40], [65], [66] domes: [43], [58], [64], [66], [91], [97] lakes: [66] rock: [40], [65] Salt Fork of the Brazos River: [43] sand: [41], [58], [72], [85], [91] blast: [86] building: [85] filtering: [86] glass: [85]-86 sandstone: [41], [52], [55], [58], [59], [72], [76], [81], [84], [86] Sandy Creek: [60] San Saba County: [70], [88] Santa Anna: [86] satin spar: [64] Satorsky, Cyril: [vii] scale, geologic time: [2], [3] scintillation counter: [96] schist: [41], [56], [58], [72], [73], [76], [81], [87], [93] actinolite: [87] graphite: [63], [87] hornblende: [87] mica: [76], [87] talc: [87], [93] schistosity: [87] schorl: [95] Scurry County: [98] sedimentary rocks, definition of: [10] sediments: [8], [11] chemical: [12] selenite gypsum: [63], [64], [76] series: [2] serpentine: [34], [40], [44], [75], [87], [93] serpentinite: [87] Seven Heart Gap: [45] Shafter: [57], [58], [60], [67], [90] Shafter Lake: [83] shale: [12], [13], [19], [40], [45], [70], [87], [88] oil: [88] Shelby, Cader A.: [vii] Sheridan prospect: [53] siderite: [70] Sierra Blanca: [58], [67], [82] silicified wood (see also [petrified wood]): [20] silt: [12], [85] siltstones: [12] silver: [26], [52], [57], [59], [89] glance: [90] horn: [90] minerals: [89] native: [26], [89] Silver Creek: [58] sinter, calcareous: [46] slate: [13] Smith County: [70] smoky quartz: [82], [83] soapstone: [40], [93] soils: [10] Solitario uplift: [42], [88] Sonora: [18] Caverns of: [19] specific gravity: [18], [99] specular hematite: [67] sphalerite: [57] Spiller mine: [74] Spindletop salt dome: [91] Spring Creek: [56] stalactites: [18], [19] stalagmites: [18], [19] Starr County: [84], [98] static metamorphism: [13] Stonewall County: [52] streak or powder of minerals: [17] streak plate: [17], [22] Streeter: [48], [94] striations: [81], [95] strontianite: [49] strontium: [49] sulfur: [29], [30], [31], [32], [34], [36], [81], [90] Sutton County: [18], [19] system: [2]
T talc: [28], [29], [34], [87], [93] schist: [87], [93] Talc Rock: [93] Taylor County: [45], [49], [60] Terlingua area: [46], [47], [49], [50], [65] Tertiary: [2], [3], [9], [21], [45], [49], [51], [52], [56], [57], [60], [70], [77], [78], [79], [83], [84], [85], [86], [90], [97], [98] terrazzo— chips: [55], [76] floors: [88] tests, chemical (see [chemical tests]) thorium: [80] Thrall oil field: [88] time, geologic: [2], [3] tin: [47] topaz: [36], [38], [94] tourmaline: [33], [82], [94] Town Mountain: [95] Trans-Pecos area: [9], [10], [45], [60], [62], [69], [78], [82], [83], [84], [85], [87], [89], [90], [98] trap rock: [45] travertine: [46] Travis County: [20], [45], [46], [49], [68], [69], [70], [88] tremolite: [44], [93] Triassic: [3], [45], [87] Trinity County: [98] tufa, calcareous: [46] twinned crystals: [46], [63] tyuyamunite: [97]
U Upshur County: [70] uranium: [80], [95], [96] minerals: [95] uraninite: [97] uranophane: [31], [95], [97] Uvalde County: [45], [60], [84], [88]
V Valley Spring Gneiss: [59] Val Verde County: [45], [74], [75] Van Horn area: [42], [52], [53], [58], [59], [60], [75], [76], [79], [85], [87], [90] Van Horn Mountains: [45], [55], [76], [79], [95] Van Zandt County: [66] verde antique: [88] vesicles: [45] vitrophyre: [40], [77] volcanic ash: [41], [97] volcanic igneous rocks, definition of: [9] volcanoes: [9], [97], [98]
W Waco: [88] wad: [73], [74] Walker County: [52] Ward County: [66] Washington County: [78], [84] weathering: [11] Webb County: [11], [84] Weches strata: [70] Wharton County: [91] white mica (see [muscovite]) Wilbarger County: [98] Willacy County: [66] Williamson County: [20], [60], [69], [70], [88] Willow City: [94] wood opal: [78] wood, petrified: [20], [52], [78], [84] Wylie Mountains: [95]
Y yellow copper ore: [53] Yoakum County: [66] Young County: [58] yttrium: [80]
Z Zapata County: [83], [84] Zavala County: [86] zirconium: [80]