180 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Catalogue of rocks collected in 1873 oy A. C. Peale, $-c. — Continued. 



Name, &c. 



Locality. 



Porphyrinic trachyte, from dike in sandstones 



do 



Porphyritic trachyte 



do 



Brown trachyte ? from breccia 



do...... 



Dark greenish trachyte ? from breccia 



Light reddish tufa from breccia 



Black trachyte ? from breccia 



Greenish trachyte ? from breccia 



Black trachyte ? from breccia 



Dark gray trachyte from breccia. 



Light gray hornblendic trachyte from breccia. 



Greenish laminated trachyte from breccia 



Ashy-gray tufa from breccia 



Trachyte ? (dike No. 1 in Cretaceous rocks) . . . 



Sandstone conglomerate 



Trachyte (dike No. 2 in Cretaceous rocks) 



Trachyte (dike No. 3 in Cretaceous rocks) 



Trachyte (dike No. 4 in Cretaceous rocks) 



Porphyritic trachyte (dike in Cretaceous sand- 

 stones above coal-bed). 



Porphyritic trachyte? 



Trachyte .- 



.do 



Trachyte (dike in Cretaceous rocks) . 



Sandstone (above dike) 



Porphyritic trachyte 



do 



do 



Trachyte (dike) 



Sandstone (above dike) 

 Red basalt ? 



Black basalt?. 

 do 



Black basalt , 



Argillaceous shale 



Black basalt 



Purplish basalt 



Black basalt 



Amygdaloidal basalt . 

 do 



Bed vesicular basalt. 



Tufa 



Black basalt 



.do 



Argillaceous shale (calcareous Cretaceous) . 



Whitish trachyte 



Purplish trachyte 



Porphyritic obsidian, with spherules. 

 "White tufa 



Gray trachyte 



Porphyritic obsidian 



Purple vesicular rhyolite, -with hyolite and 

 chalcedony in the cavities. 



Light trachyte 



Purple trachyte 



Purple rhyolite 



Tufaceous trachyte (in breccia) . 



Trachyte in breccia 



Trachyte, greenish, in breccia 



Anthracite Creek, near Mount Marcellina. 



Do. 

 Mount Marcellina. 



Do. 

 "West Fork of Ohio Creek. 



Do. 



Do. 



Do. 



Do. 

 Station No. 31, near the head of West Pork of 

 Ohio Creek. 



Do. 

 Head of West Pork of Ohio Creek, below sta- 

 tion 31. 



Do. 



Do. 



Do. 

 Ridge southeast of Station No. 32, between head 

 of branches of Slate River and Ohio and An- 

 thracite Creeks. 



Do. 



Do. 



Do. 



Do. 

 Small southern branch of Anthracite Creek, near 



the head of the creek. 

 Station 30, head of Ohio Creek. 

 Station 33, between the North Pork of the Gun- 

 nison and Rock Creek. 

 Ridge below station No. 34, west of Coal Creek. 

 Coal Creek, near camp 36. 



Do. 

 Summit of station 38, east of Smith's Pork of the 



Gunnison. 

 Slope of station 38. 

 Station 39, east of station 38. 

 North side of Smith'sFork, near foot of station 38. 



Do. 

 Station 40, north of the North Fork of the Gun- 

 nison. 



Do. 

 Station 42, between North Fork of Gunnison and 



branches of Grand River. 

 Station 45, northwest of station 42. 

 Ridge leading to station 47. 

 Summit of station 4$, south of Grand River. 

 Slope of station 48, south of Grand River. 

 Base of station 48, south of Grand River. 



Do. 



Do. 



Do. 



Do. 

 Top of mesa, near station 54, south of Grand 



River, north end. 

 Top of mesa, near station 59, south end, east of 



Gunnison River. 

 Bluff on Gunnison River, below station 60. 

 Station 71, on Gunnison River. 

 West of station 71, on north side of Gunnison 

 River. 



Do. 

 Above station 73, on north side of Gunnison 

 River. 



Do. 



Do. 



Do. 



Do. 



Station 77, on north side of the Gunnison, near 

 the Grand Canon. 

 Do. 

 Station 79, on south fork of Smith's Fork of the 

 Gunnison. 

 Do. 

 Do. 



