202 GEOLOGICAL SUEVEY OF THE TEEKITORIES. 



Catalogue of rocks — Coatinued. 



No. 



63 

 64 

 65 

 66 

 67 

 68 

 69 

 70 

 71 

 72 

 73 

 74 

 75 

 76 

 77 

 78 

 79 

 80 

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 82 

 83 

 84 

 85 

 86 

 87 

 88 

 89 

 90 

 91 

 92 

 93 

 94 

 95 

 96 

 97 

 98 

 99 

 100 

 101 

 103 

 103 



104 

 105 

 106 

 107 

 108 

 109 

 110 

 111 

 112 

 113 

 114 

 115 

 116 

 117 

 118 

 119 

 120 

 121 

 122 

 123 

 124 

 125 

 126 

 127 



128 

 129 

 130 

 131 



132 

 133 

 134 

 135 

 136 

 137 

 138 

 139 

 140 



Gneiss 



Purple felstone or potrosilex 



Gray felstone or petrosilex 



Yellow felstone or petrosilex 



Eecl felstone or petrosilex 



Ked elvanite or quartz porphyry 



Gray elvanite or quartz porphj'ry , 



Pink elvanite or quartz porphyry 



Ked felstone or petrosilex 



Yellow felstone or petrosilex 



Flesh-colored felstone or petrosilex 



Gray felstone or petrosilex 



Chlorite schist 



Light-gray sandstone, (Pliocene) - 



Greenish sandstone conglomerate 



Granite 



Blue felstone or petrosilex 



Ar.ffillaceous sandstone 



Yellowish-gray felstone or petrosilex 



Gray sandstone 



Blue felstone or petrosilex 



Gray quartz porphyry or elvanite 



Pink felstone or petrosilex 



Gray elvanite or quartz porphyry 



Jasper porphyry 



Striped or slaty porphyry 



Chlorite schist 



Garnetiferous hornblende schist 



"White quartz , 



Old hot spring deposit 



Igneous rock basalt 



Igneous rock, (red) 



Light-red coarse sandstone 



Dark -brown ferruginous sandstone 



Garnetiferous gneiss 



Greissen , 



Compact red sandstone 



Volcanic conglomerate 



Yellow quartzite 



Coarse brown sandstone 



Diorite 



Albite granite 



Pinkish trachyte, with hornblende 



Yiolet-oolored rhy elite, with mica 



Pummice-stone 



Iron-stone 



Chlorite schist 



Granite 



Eed sandstone 



Basalt 



Eed volcanic breccia 



Hornblende schist, (garnetiferous) 



Gray gneiss 



Gre(3n porphyritio trachyte 



(jrray porphyritic trachyte 



Dark-green porphyritic trachyte 



Siliceous clay-slate 



"White quartzite , 



Gray quartzite 



Gray sandstone 



Bed limestone 



Yellow limestone , 



Granite 



Basalt coated with calcite 



Gray rhyoUte , 



Light yellowish-gray trachyte 



Dark-gray rhyolite . ". _ 



Old hot spring deposit 



(jreenish-gray rhyolite 



Yellow rhyolite 



Blue rhyolite 



Chalcedony, with malachite 



"White trachyte 



"White and red trachyte 



Bluish trachyte iniiltrated with sulphur 



Dark perlite-like trachyte 



"White trachyte 



Gray rhyolite '. ...: . . .; . , 



Locality. 



"Wild Cat Canon, Montana Territory. 



Do! 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Devil's Pathway, Montana Territory. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Below "Virginia City, Montana Territory. 



Do. 



Do. 

 Above Virginia City, Montana Territory. 



Do. 



Do. 



Do. 

 Madison Eiver, above Virginia City. 



Do. 

 Mystic Lake, near Port Ellis, Montana Ter. 



Do. 



Do. 

 Spring Canon, near Port Ellis, Montana Ter. 

 Above Spring CaBion, near Port EUis, Mon- 

 tana Territory. 

 Xear Botteler's, on Yellowstone Eiver. 



Do. 



Do. 

 Emigrant Gulch, Montana Territory. 



Do. 

 Emigrant Peak, Montana Territory. 



Do. 



Do. 



Do. 

 Above Botteler's, on Yellowstone Eiver. 

 Canon of Yellowstone, above Botteler's. 



Do. 

 Devil's Slide, Cinnabar Mountain. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Above Cinnabar Mountain. 

 Gardiner's Eiver. 



On mountain, near Hot Springs, Gardiner's 

 Eiver. 



Do. 



Do. 

 Hot Springs, at Gardiner's Eiver. 

 On mountain, near Hot Springs, Gardiner's 

 Eiver. 



Do. 

 Tower Creek. 

 Poot of Mount "Wasbburne. 

 Grand Canon of the Yellowstone Kiver, 



Do. 



Do. 



Do. 



Do. 



Do. 



