Xll 



ANALYTICAL KEY 



AOTINOLITE, as a rock, 2053. 

 in dioryte, 1318. 

 " muscovadyte, 1309. 

 " porphyrel, 1297. 

 " quartz-porphyry, 387. 

 " quartzyte, 1327. 

 " schist, 348, 1115, 1.357, 1446, 1628. 

 " taconyte, 439, 39S. 

 " tuff, 1047, 2129. 



ADULARIA, in aporhyolyte, 140. 

 with copper, 583. 



FERINE, 1399, 1767, 2001, 2194, 2253. 



see under green augite and esterellyte. 



ALBITE, 1997. 



in amphibolyte, 872. 

 " epidopyte, 842. 

 " pegmatyte, 1997. 

 " tuflf, 8B. 



AMPHIBOLE, poikilitic, 767, 1345, 2197, 2209, 638G. 

 see under hornblende, actinolite, etc. 



ANDESINB, in basalt, 176, 540. 

 in diabase, 222. 

 " dioryte, .333. 

 " gabbro, 1849. 

 " gneiss, 1777. 



AN-DESINE OLIGOCLASE, 1992, 2176. 



ANORTHITE, in anorthosyte, 637. 

 in basalt, 176. 

 " diabase, 133, 242. 

 " greenwacke, 1367. 



ANORTHOCLASE, in aporhyolyte, 140, 151. 

 in esterellyte, 1061, 1105, 86G. 

 " granite, IB, 74, 511, a35, 551G. 

 " schist, 1729. 

 analyses, 1105, 551G. 



ANTIDORITE, 349, 1814, 1848. 

 in diabase, 244. 

 " gabbro, 770W, 1814. 



APATITE, biaxial, 366H. 



in diabase, 7, 41, 53B, 221, 459, 567, 1918. 

 " dioryte, 339B, 708. 

 " gabbro, 1, 5, 248. 

 " granite, IB. 

 " granulitic gabbro, 122. 

 " oligoclase, 311. 

 " orthoclase, 11A. 

 " porphyry te, 11. 

 " pyroxenyte, G04H. 

 " quartz-porphyry, 1279, 24W. 



APOPHYLLITE, 2178, 2256, 2258. 



AUGITE, aegyrine, see under green augite. 

 alteration of, 1.33, 300, 1847, 1848. 



to diallage, 300. 

 analyses, 1094, 86G, 551G. 

 distinguished from enstatite, 133. 

 fringed with hornblende, 1847, 1848. 

 green, 551G, 667, 674, 685, 1094. 

 globular structure, 1092, 1334, 1347. 

 idiomorphic, 228. 



in aporhyolyte, 226, 685. 

 " diabase, 15, 41, 73, 126, 133. 

 " esterellyte. 1094, 1399. 

 " gabbro, 11A. 



with abnormal optic angle, 291, 297, 2001. 

 in granite, 435, 043, 6G7, 668, 674, 774, 551G. 



see under esterellyte. 

 ophitic, 53, 106. 108. 025. 



poikilitic, 677, 767, 1089, 1092, 1330, 1341, 2197. 

 schillerization of, 126. 

 small optic angle, 120. 223, 291, 297, 1828, 2001, 



178E. 



two generations of, IM, 222, 228, 229, 291, 515, 

 517, 015. 820. 1092, 1849, 2064. 



BAEITE, 272, 288A, 1710. 

 BASTITE, in gabbro, 1710. 



BIOTITE, around magnetite, 694. 

 changing to chlorite, 728. 

 " pennine, 699. 

 greenish. 20'J. 

 in diabase, 81. 205. 



" dioryte, 41):!. 



" gabbro, 291, 954. 



" mica schist, 44. 



" noryte, 983. 



quartzytc. 270. 

 poikilitic, 1092, 1777, 638G, 740G. 

 porphyritic, 2261. 

 yellow-brown, 1842. 



BORNITE, 64A, 281. 



BOWLINGITE, 162. 193, 703. 



in diabase . 1.33, 141, 188, 560. 



BRONZITE, 983. 



BROWN HORNBLENDE, see hornblende. 



BYTOWNITE, in anorthosyte, 770, 810, 814. 

 in diabase, 198. 222. 



CALCITE, cementing conglomerate, 149. 25 1. 

 cone-in-cone, 1846. 

 from feldspar, 820. 

 spherulitic, 1607. 

 in amphibolyte, 731. 



" conglomerate, 149, 254, 874, 908, 1070. 



" diabase, 822. 



" dioryte, 424, 731, 1410, 1318. 



" feldspar schist, 2014. 



" gabbro, 1802. 



' granite, 730,' 1100, 2044, 22&3, 686G. 



" graywacke, 473. 2043. 



" greenstone, 1015, 1018, 1068, 2022. 



" grOnerite, 437, 3794. 



" kersantyte, 2261. 



" mica schist, 422. 



" (1 uartz porphyry, 370, 387. 2229, 2237, 2275, 

 24W. 



" porphyrel, 2170, 2260. 



" veins, 272, 423. 

 replacing feldspar, 154, 2229. 



CHALCEDONY, 173, 200A, 1013. 

 in quartzyte, 862, 2048. 

 " zirkelyte, 1905. 



