646 



REPORT UNITED STATES GEOLOGICAL SURVEY. 



Hyalite. — Coating basalts, on Station SI, south of Ross Fork of Snake 



River. 

 LlMONlTE (pseudomorph after pyrite). — Ridge of Station No. 77 in the 



Bannock Range. 

 Mica (museovite). — In the granites of the Wind River foot-hills. 

 Obsidian. — (See Feldspar.) 

 Orthoclase. — (See Feldspar.) 

 Salt. — (See Halite.) 



B. 



CATALOGUE OF ROCKS COLLECTED IN 1877 IN THE GREEN 



RIVER DISTRICT. 



No. 



1 



2 

 3 



4 



5-6 



7 



8 



9 



10 



11 



12 



13 



14 



15-17 



18-19 



20-22 



23 



24-25 



20-27 



28 



29-30 



31-32 



33 



34 



35 



30 



37 

 38 



39 



40 

 41 

 42 

 43 

 44 

 45 



Name, <fcc. 



Gray sandstone (Green River Tertiary) 



Greenish-gray sandstone (Green River Tertiary) 



Granite 



White limestone (Green River Tertiary) 



Oolitic limestone (Jurassic) 



Calcareous sandstone (Tertiary) 



Conglomerate 



White limestone (Green River Tertiary) 



Conglomerate (Cretaceous ?) 



Conglomerate (Waksatch Tertiary) 



Redlimestone (Triassic) 



Red siliceous sandstone 



Quartzite 



Basalt 



Scoriaceous basalt 



Basaltic obsidian 



Basalt 



Scoriaceous basalt 



Green chloritic schist 



Basalt 



Sulphur and calcareous tufa 



Coal 



do. 



Fire-clay 



Coke 



Basalt 



Light-gray fossiliferous limestone (Jurassic) ... 

 Red quartzitic sandstone 



Bluish limestone (Silurian) 



Brown limestone (Pliocene) 



Chloritic schist (Cambrian) 



Blue limestone 



Oolitic limestone (Silurian) 



Quartzitic shale (Silurian) 



Slate (Silurian) 



Locality. 



Mouth of Little Sandy River. 



Do. 

 Fremont's Butte. 

 Near mouth of Horse Creek. 

 Meridian Ridge, south of Fontenelle Canon. 

 Ham's Fork of Green River. 

 Ham's Pork, east of Oyster Ridge. 

 Ham's Fork Plateau, near Sublette's road. 

 Smith's Fork, near the forks. 

 Meridional Valley, on Horse Creek. 

 Below Wyoming Peak. 



Do. 



Do. 

 Valley of John Gray's Lake. 

 Blackioot River, in 'Hollow Hand. 

 Blackfoot Basin, west of river. 



Do. 

 Crater in Blackfoot Basin. 

 Bannock Range, near Station 77. 

 Station 86, on crater in Basalt Valley. 

 Sulphur Lake, east of Soda Springs. 

 Twin Creek mines. 



Divide between Ham's Fork and Twin Creek. 

 Twin Creek mines. 



Do. 

 Station 108 (Mount Kimball), Bear Lake Pla- 

 teau. 

 West of Station 108 (Mount Kimball). 

 Station 117, in southern extension of Portneuf 



Range. 

 Gallon in Bear River Range, back of Smithfield. 

 Bear River, near Gates, in Cache Valley. 

 Five-Mile Canon, west side Cache Valley. 

 Station 131, north end Cache Valley. 

 Below Station 133, head of Marsh Creek. 



Do. 



Do. 



