ANALYTICAL KEY. 



XXI 



with epidote, 1123. 



" with feldspar, 1278, 1304, 1729, 1730. 

 " griinerite, 437. 

 ' hornblende, 329, 360, 925, 1300. 

 " magnetite, 1024. 

 " mica, 848. 

 black rock, 44. 

 subgranitized, 1996J/2- 

 with cordierite, 1708, 2055. 

 " staurolite, 849. 

 " pyrito nodule, 1508. 

 " qucartz, 1012, 1446. 

 " quartz and feldspar, 1729, 1730. 

 " sericite, 351, 375, 883, 890. 89W. 

 SCORIA, 75. 



with prehnite, 91C. 

 SERPENTINE, 2158. 

 SHALE, 817. 



analysis, 809. 

 n M!,* 67, 809. 



SILICA-KAOLIN, analysis, 1701. 

 SIDERYTE, 312, 1310, 2052, 158S. 



SLATE, 726. 



calcareous, 748. 

 clay, 395. 

 graywacke, 510. 

 metamorphosed, 601G, 602G. 

 pencils, 452. 

 siliceous, 745. 

 . with chlorite, 397. 

 " pyrite, 32ii. 



SVENYTE, 343, 853, 952, 219(j. 



with augite, 780, HOC, 1731 1. 



TACONYTE, change of minerals in, 39S, 1338. 



greensand, 39S, 538, 55S. 

 in conglomerate, 852A, 852B. 

 origin, 1530, 39S, 2138. 

 pebbles, 852B, 852C, 2069. 

 structure of, 1530, 2138. 

 with glass, 1319. 



" glauconite, 441, 1276. 



" pyroxene, 879G. 



" siderite, 1307, 53S, 618. 



" two kinds of quartz, 2138. 



TRACHYTE, GG1. 



TRACTOLYTK, 513, 514, 693, 816. 



TUFF, 7B, 8B, 17, 21, 24, 680, 1004, 1592, 1832, 2030%, 



2190. 



green schist, 1060. 

 greenstone, 356, 1071, 1072. 

 modified, 1047, 1051. 

 pebbly, 1419. 

 submarine, 61, 626. 

 with quartz, 61. 

 " thalite, 125. 



Two HARBOR ROCK, 117. 

 VOLCANIC GRIT, 2129. 

 VOLCANIC TUFF, see tuff. 



ZIRKELYTE, 13B, 14, 19, 46, 52, 170, 1324, 1824, 1825, 



1833, 1899, 1905, 2064, 2067. 

 analysis, 10, 4(i. 

 globuliferous, 544. 

 with quartzine, 1905. 



