Transparent—light will pass through, and objects can be seen.
Trans-Pecos—area of Texas located west of the Pecos River (see [p. 42]).
Volcanic rocks—[igneous rocks] that have formed on the earth’s surface; [extrusive rocks].
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]