54 



INDKX 



Boulder-cUy, ao6 



indicated by nature of soil, 96 

 Boulders, 201, 206 



iary-lines, geological, 48, 103 

 Breccia, defined, 65 

 <-arth, 198 



-.Durable cln 

 -oology, 46 

 231 

 n. as a colour of rocks, 69 



Calcite. 191, 219, 233 



Canada. Geological Survey of, 39, 5 1 



Canoes, buried, 198 



Carbonates, detection of, 67 

 most important, 233 



Carboniferous Limestoix . \ 

 rocks of, 1 68, 174 



Casts of organisms as fossils, 78 



Celadonite, 232 



Celestine, 233 



Cellular texture of rocks, 62, 170 



Chalcedony, 228 



Chalcopyrite, 228 



Chalk, escarpment of, 194 

 springs of, 133 



reversed faults and thrust- planes 

 in, 141, 143 



"Cheese-taster," geological, 31 



Chrmical analysis, 221, 223 



Chert, 63 



Chiastolite, 230 



Chilled edge of intrusive rocks, 

 161, 181 



Chloride, most frequent, 228 



Chlorite, 179, 232, 241 



as a colouring ingredient of 

 rocks, 70 



Chlorite-schist, soapy feel of, 73 



Clastic rocks, 54, 64 



Cleavage, 152, 186, 187, 189 



Climate, former conditions of, in- 

 dicated by fossils, 82 



Clinometer, use of, in field-geology, 



25.105 



Coal, formed of plant-remains, 66 

 Coal-seams, evidence of old terres- 



tri.il surfaces, 89 



Coal-seams, lykes, 



164 



Coast-ice, 203 

 Coast-sections, value of, 18. i p. 



146 

 Cole, Irof. G. A., cited, 224, 



250 no if 

 Colour, value of, in determining 



KS. 55, 68 

 Columnar structun 

 Compact rocks, 59, 63 



.iss, magnetic, in field - 

 geology, 24. 105 

 Conglomerate, definition of, 65 

 lessons from, 4 

 ;ferous, 79 

 as evidence of unconformability. 



123, 136 



schistose, 185, 186 

 Contortion of strata, 151 



rite, 230 

 Cornwall, killas or slate of, 189 



mineral veins of, 192 

 Corundum, 219 



< rannoges or stockaded islets, 198 

 Crushing and shearing of rocks, 



181 



Crypto-crysUilline texture of rocks, 

 62 

 llinc rocks, 54, 59, 157, 158 



De la Beche, H.. diagrams by, 



88, 119, 129, 190 

 Delessite, 232 

 Deposits, superficial, 196 

 Derivative rocks, 54 

 Desiccation-cracks, 84 

 Detritus, rounded and angular, 98 

 Diabase, a compound rock, 62 

 Diallage, 231 

 Diamond, 219 

 Dichroism, 248 

 Dick, A. . microscope devised by, 



33, 250 note 



Dioritc, a compound rock, 62 

 Dip, 105 



influence of, on outcrop of v 



109. * 17 



