Report of a reconnaissance in the Ute country made in the year 1873, by Lieut. E. H. Ruffner, corps of engineers

Report of a reconnaissance in the Ute country made in the year 1873, by Lieut. E. H. Ruffner, corps of engineers - Page 90

RECONNAISSANCE IN THE UTE COUNTRY. 85 This is not all conjectnre. San Cristobal Falls, on Lake Fork of Gun­nison River, are precipitated over a bed of trachyte- porphyry. The remnants of a bed of volcanic trachyte were observed low down in Antelope Park Canon. Porphyritic trachyte was foand in the bed of the valley of Lake Creek, midway between Lake Creek Pass and Twin Lakes, and the extensive deposits of lava on the slope of Saguache Valley. Had the latter occurred at a contracted portion of the valley, it would have been sufficient to produce the indicated results. A list of rooks and fossils collected by F. Hawn, geologist of the Ute reconnaissance in Colo­rado Territory. Names. Localities. Inoceramus publematicus . Ostria congesta Graphic granite Gneiss Granite, ( felspathic) Trachy- dolerite Trachyte Gray granite Wood opal White granite Brown granite FTerladcshtyo- ndeo lerite Porphyritic trachyte .. Trachyte Volcanic tufa Undetermined Trachyte Argillaceous slate White sandstone Quartzose slate Argillaceous quartzite. Argillite Feldstone Brown trachyte Porphyritic trachyte.. Basalt Calcareous rock Dolerite Gray granite Red limestone Mica slate Volcanic tufa Product us costatus P. Cord P. Reticulatus Spirifer liueatus Spirigera subtilita Gold quartz . t Compact feldstone Crystalline feldstone .. Bituminous coal Productus reticulatus. Euomphalns latus Gorgonia Productus reticulatus. Spirifer liniatus S. Kentuckensis S. Maconensis Spirigera inflatus Muddy Creek ,. do Saugre de Cristo Valley do do Saugre de Cristo Mountains Camp Loma 10 miles above Camp Loma Camp 22, in green clay Cement Creek, Las Animas Valley do Lower slopes Las Animas Valley, in Baker's Park. Cement Creek, high peaks in mountains Baker's Park, high peaks in mountains do .' Cement Creek, high peaks in mountains do Mineral Creek, high peaks in mountains West branch of Mineral Creek do . do. . do. . do. . do. . d o . . do. . do. . do. . do. . do. . do. Between Cement aud Mineral Creek High in the mountains, Las Animas Valley Between Hamilton Park and Animas Park, al­titude 8,265. As above do do do Little Giant gold- lodes, Las Animas Valley.. Wall Rock, Little Giant gold- lode Baker's Park, Las Animas Valley BAentiwmeaesn PHarakm i lton Park and Animas Park, altitude 8,265. Sec. 1, No. 9 and 19,3 miles below Hamilton Park, Las Animas Valley.