Chapter 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