184 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Catalogue of rocks collected, c^-c. — Coutiuueil. 



143-46 



147-48 

 149 

 1-.0 

 151 

 152 



153-54 

 155 



156-57 

 158 

 159 

 165 

 161 



162-63 

 164 

 165 



166 

 167 

 ]P8 

 169 

 170 



171 



172 

 173-74 



175 

 176-77 



178 

 179 



180 



181 

 182 

 183 

 184 

 185 

 186 

 187 

 188 

 189 

 190 



191-92 

 193 

 194 

 195 

 196 



197-98 

 199 

 200 

 201 

 202 

 203 



204-13 

 214 



215 



216-18 



219 



226 

 221 

 222 

 223 

 224 

 225 

 JJ26 



227 

 228 

 229 

 230 

 231 



232 

 2;J3 

 2:'4 

 235 

 236 



Gray sandstone, (Cretaceous) 



Hard, greuuish saudstoue, (Cretaceous) ... . 



Hard, gray sandstone 



Soft, gray sandstone 



Basalt 



Volcanic breccia 



Trachyte 



Rbyolite 



Basalt, with olivine 



Basalttuflf 



Diabase 



Bl le slate 



Trachyte 



Soft sandstouo, (Cretaceous) 



Clay slate, (Cretaceous) 



Mail 



Sandstone, (Tertiary) 



Quart zite, (Cretaceous) 



Sandstone, (Crotacfious) 



Purple sauidiuo trachyte 



Micaceous gneiss 



Limestone, (Carboniferous) 



Brown sandstone metamorphosed, (Tertiary) 



Trachyte-breccia 



Trachyte 



Gneiss 



White i-hyolitic 



Volcanic sandstone 



Gray sandstone 



Micaceous gneiss 



Quartz 



Tracby tic sandstone 



Obsidian porphyry, (black) 



Obsidian porphyry, (brown) 



Obsidian porphyry, (porlite-like) 



Porphyritic obsidian 



Spheriilitic obsidian 



Vesicular trachyte-porphyry 



White trachyte-porphyry 



Ebyolite 



Jasper 



Perlite-lilte trachyte-porphyry 



Green and brown jasper 



Cavernous trachyte-porphyry 



Common trachyte-porphyry 



White trachyte 



Vesicular trachyte 



Porphyritic trachyte 



Obsidian porphyry 



Vesicular trachyte 



Arj»illo-trachy te porphyry 



Hot-spring deposit 



Trachyte-conglomerate 



Tracby tic tnfl" 



Vesicular trachyte 



Brown obsidian sandstone 



Black obsidian sandstone 



Purplish volcanic conglomerate 



Rod volcanic conglomerate 



White trachyte 



Trachyte pofjihyry 



Geyserite sandstone 



Trachyte porphyry 



Bhyolite 



Cavernous trachyte, (porphyritic) 



Vesicular trachyte-porphyry 



Siliceous limestone 



Quartzite 



Gray calcareous sandstone, (Jurassic) 



White arenaceous limestone 



Blue limestone, (Carboniferous) 



Jaspory limestone-conglomerate 



Bridger Peak, near Fort Ellis. 



Do. 

 Head of Middle Creek, Montana. 



Do. 

 Valley of Yellowstone River. 

 Kear Botelor's, Montana. 



Do. 



Do. 



Do. 



Do. 

 Cinnabar Mountain, Montana. 



Do. 

 Electric Peak, Yellowstone Valley. 



Do. 



Do. 

 Valley of Yellowstone River, near 



Boteler's. 

 Bluff opposite Gardiner's River. 



Do. 



Do. 



Do. 

 Mouth of Black-Tail Deer Creek, 



Montana. 

 !Near mouth of Black-T.iil Deer 



Creek, Montana. 

 Near Ellc Creek, Montana. 



Do. 



Do. 



Do. 

 East Fork of Yellowstone River. 

 iSTear Tower Creek, Yellowstone 



Valley, Montana. 

 Near junctitm of East Fork of Yel- 

 lowstone, Montana. 



Do. 



Do. 

 Near Grand Canon of Yellowstone. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Grand Canon of Yellowstone Eiver. 



Do. 



Do. 



Do. 



Do. 

 Violet Creek, valley of the Yellow- 

 stone. 

 Crater Hills, Yellowstone Valley. 



Do. 

 Near Mud Volcanoes, Yellowstone 

 Valley. 



Dd. 



Do. 



Do. 



Do. 



Do. 



Do. 

 Fire-Hole Ba.sins, Yellowstone Na- 

 tional Park. 

 Upper Caiion of Madison River. 



Do. 



Do. 



Do. 

 East side of Madison River, near 

 Middle Caiion. 



Do. 



Do. 



Do. 



Do. 



Do. 



\ 



