202 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Catalogue of rocks — Continued. 



63 



64 

 65 

 66 

 67 

 68 

 69 

 70 

 71 

 72 

 73 

 74 

 75 

 - 76 

 77 

 78 

 79 

 80 

 81 

 82 

 83 

 84 

 85 

 86 

 87 

 88 

 89 

 90 

 91 

 92 

 93 

 94 

 95 

 96 

 97 

 98 

 99 

 100 

 101 

 102 

 103 



104 

 105 

 106 

 107 

 108 

 109 

 110 

 111 

 112 

 113 

 114 

 115 

 116 

 117 

 118 

 119 

 120 

 121 

 122 

 123 

 124 

 1-25 

 126 

 127 



128 

 129 

 130 

 131 



132 

 133 

 134 

 135 

 136 

 137 

 138 

 139 

 140 



Gneiss 



Purple felstone or petrosilex 



Gray felstone or petrosilex 



Yellow felstone or petrosilex 



Ked felstone or petrosilex 



Ked elvanite or quartz porphyry , 



Gray elvanite or quartz porphyry 



Pink elvanite or quartz porphyry 



Eed 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 



Argillaceous 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 



Gametiferous hornblende schist 



"White quartz 



Old hot spring deposit 



Igneous rock uasalt 



Igneous rock, (red) 



Light-red coarse sandstone 



Dark-brown ferruginous sandstone 



Gametiferous gneiss 



Greissen 



Compact red sandstone 



Volcanic conglomerate 



Yellow quartzite 



Coarse brown sandstone 



Diorite 



Albite granite 



Pinkish trachyte, with hornblende 



Yiolet-colored rhj'olitc, with mica 



Pummice-stone 



Iron-stone 



Chlorite schist 



Granite 



Ked sandstone 



Basalt 



Eed volcanic breccia 



Hornblende schist, (gametiferous) 



Gray gneiss 



Green porphyritic trachyte 



Gray porphyritic trachyte 



Dark-green "porphyritic trachyte 



Siliceous clay-slato 



White quartzite 



Gray quartzite 



Gray sandstone 



Eed limestone 



Yellow limestone 



Granite 



Basalt coated with calcite 



Gray rhyolite 



Light yellowish-gray trachyte 



Dark-gray rhyolite . ". 



Old hot spring deposit 



Greenish-gray rhyolite 



Yellow rhvolite 



Blue rhyolite '. 



Chalcedony, with malachite 



TThite trachyte 



TThite and red trachyte 



Bluish trachyte infiltrated with sulphur 



Dark perlite-like trachyte 



"White trachyte ^.--^ 



Gray rhyolite r; . . . . .v .7. J ." . . i7, 



"Wild Cat Canon, Montana Territory. 



Do. 



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. 

 BeloAv Virginia City, Montana Territory. 



Do. 



Do. 

 Above Virginia City, Montana Territory. 



Do. 



Do. 



Do. 

 Madison Eiver, above Virginia City. 



Do. 

 Mystic Lake, near Fort Ellis, Montana Ter. 



Do. 



Do. 

 Spring Canon, near Fort Ellis, Montana Ter. 

 Above Spring Canon, near Fort Ellis, Mon- 

 tana Territory. 

 Xear Botteler's, on Yellowstone Eiver. 



Do. 



Do. 

 Emigrant Gulch. Montana TeriTitory. 



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. 

 Foot of Mount "Wasbbnme. 

 Grand Ca$on of the Yellowstone River. 



Do. 



Do. 



Do. 



Do. 



Do. 



