GEOLOGICAL SURVEY OF THE TERRITORIES. 203 



Catalogue of rocks — Continued. 



Xo. 



141 

 142 

 143 



144 

 145 



146 

 147 

 148 

 149 

 150 



151-154 

 155 

 156 

 157 

 158 

 159 

 160 



161-181 



182-183 

 184 

 185 

 186 

 187 

 188. 



189-190 



191 



192 

 193 

 194 

 195 

 19G 

 197 

 198-199 

 200-201 

 202 

 203-204 

 205 

 206 

 207 

 208 

 209 

 210 

 211 

 212 

 213 



214 

 215-216 

 217 

 218 

 219 

 220 

 221 

 222 

 223 

 224 

 225 

 226 

 237 

 228 

 229 

 230 

 231 

 232 

 233 

 234 

 235 

 236 

 237 

 238 

 239 

 240 

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 242 

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 244 

 245 

 246 

 247 



Name. 



Splierulite 



Obsidian, with splierulite 



Pink trachyte 



Porphyritic obsidian 



Volcanic conglomerate 



Old hot-spring deposit 



do 



White trachyte tufa 



Argillaceous sandstone 



Eed volcanic pudding-stone - 



Trachytes - 



Porphyritic obsidian 



Trachyte 



Spheriilite 



Porphyritic obsidian 



Trachyte 



Trachyte, with hornblende and calcite. . 



Volcanic breccia 



Old hot-spring deposit 



Gray trachyte, infiltrated with sulphur. 



White trachyte 



Ked trachyte 



Bluish trachyte 



Greenish trachyte 



Gray trachyte, with hornblende 



.do. 



.do 



Obsidian 



Porphyritic obsidian 



Ked and black basaltic rock 



Hot-spring deposit 



Silicified wood 



Eed rhyolitic rock 



Volcanic breccia 



Volcanic conglomerate 



Chalcedony 



Hot-spring deposit 



White and red variegated sandstone. 



White trachyte 



Green trachyte 



Hot-spring deposit 



Yellowish trachyte 



Hot-spring deposit 



Sandstone 



Volcanic conglomerate 



Basalt, (black) 



Basalt, (red) 



Basaltic rocks, (black) 



Quartzite 



Brown coarse sandstone 



.Blue clay-slate 



Clay-slate 



Greenish-gray sandstone 



Siliceous clay-slate 



Dendritic sandstone 



Limestone 



Granite 



Hornblende schist 



Granite 



Gneiss 



White quartz 



Red compact sandstone 



Yellow calcareous sandstone. 



Dark-blue limestone 



Garnetiferous gneiss 



Mica schist 



Quartzite 



Clay-slate 



Wliite quartzite 



Limestone 



Old hot-spring deposit 



Basalt 



E.cd sandstone 



Quartzite 



Limestone 



do 



Coarse gray sandstone 



Dark-purplish rhyolito 



Light-bluish rhyolito 



Locality. 



Grand Canon of the Yellowstone Kiver. 



Do. 



Do. 



Do. 



Da 



Do. 

 Crater Hills, Yellowstone Eiver. 



Do. 

 Mud- volcanoes, Yellowstone Eiver. 



Do. 

 East Fork of Madison Eiver. 

 Near Madison Lake. 

 West side of Yellowstone Lake. 

 Southern shore of Yellowstone Lake. 



Do. 



Do. 

 Promontory Point, Yellowstone Lake. 

 Southeast shore of Yellowstone Lake. 

 Brimstone Basin, east side Yellowstone Lake. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Top of Mount Stevenson, east side of Yellow- 

 stone Lake. 

 Top of ]^Iount Doane, east side of Yellowstone 



Lake. 

 East shore of Yellowstone Lake. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Northeast shore of Yellowstone Lake. 



Do. 



Do. 

 Turbid Lake, near Yellowstone Lake. 



Do. 



Do. 



Do. 



Do. 

 Pelican Creek. 



Do. 

 South branch of East Fork of Yellowstone 

 Eiver. 



Do. 



Do. 



Do. 

 Near Crow Indian agency, Yellowstone Eiver. 

 Near Eort Ellis, Montana Territory, 

 East side Gallatin Eiver, Montana Territory. 



Do. 



Do. 



Do. 

 Between Jefferson and Madison Elvers. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. * 



Do. 



Do. 



Do. 

 West side of Jefferson Eiver. 



Do. 



Do. 

 Black-Tail, Deer Crook Valley, Montana Ter. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Beaver Head Eock, Montana Territory. 



Do. 

 Beaver Head Ca&ou, Montana Territory. 



Do. 



