646 



EEPOET UNITED STATES GEOLOGICAL SUEVEY. 



Hyalite. — Coating basalts, on Station 81, south of Eoss Fork of Snake 



Eiver. 

 LiMONiTE (pseudomorph after pyrite). — Eidge of Station No. 77 in the 



Bannock Eange. 

 Mica (muscomte). — In the granites of the Wind Eiver foot-hills. 

 Obsidiajnt. — (See Feldspar.) 

 Orthoclase. — (See Feldspar.) 

 Salt. — (See Halite.) 



B. 



CATALOGUE OF EOCKS COLLECTED IE" 1877 IK THE GEEEIS" 



EIYEE DISTEICT. 



Xo. 



Name, &c. 



Locality. 



1 



2 



3 



4 



5-6 



7 



8 



9 



10 



11 



12 



13 



14 



15-17 



18-19 



20-22 



23 



24-25 



26-27 



28 



20-30 



31-32 



33 



34 



35 



36 



37 



38 



30 

 40 

 41 

 42 

 43 

 44 

 45 



Gray sandstone (Green Eiver' Tertiary) 



Greenish-gray sandstone (Green Kiver Tertiary) 



Granite 



White limestone (Green River Tertiary) 



Oolitic limestone (Jurassic) 



Calcareous sandstone (Tertiary) 



Conglomerate 



White limestone (Green Eiver Tertiary) 



Conglomerate (Cretaceous ?) 



Conglomerate (Wahsatch Tertiary) 



Eedlimestone (Triassic) 



Eed siliceous sandstone 



Quartzite 



Basalt 



Scoriaceous basalt 



Basaltic obsidian 



Basalt 



Scoriaceous basalt 



Green chloritic schist 



Basalt 



Sulphur and calcareous tufa 



Coal 



do 



Pire-clay 



Coke 



Basalt 



Light-gray fossiliferous limestone (Jurassic) . . . 

 Eed quartzitic sandstone 



Bluish limestone (Silurian) 



Brown limestone (Pliocene) 



Chloritic schist (Cambrian) 



Blue limestone 



Oolitic limestone (Silurian) 



Quartzitic shale (Silurian) 



Slate (Silurian) 



Mouth of Little Sandy Eiver. 



Do. 

 Fremont's Butte. 

 IN'ear mouth of Horse Creek. 

 Meridian Eldge, south of Fontenelle Canon. 

 Ham's Fork of Green Eiver. 

 Ham's Fork, east of Oyster Eidge. 

 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. 

 Blackfoot Eiver, in "Hollow Hand. 

 Blackfoot Basin, west of river. 



Do. 

 Crater in Blackfoot Basia. 

 Bannock Eange, near Station 77. 

 Station 86, on crater in Basalt Valley. 

 Sulphur Lake, east of Soda Springs. 

 Twiu Creek mines. 



Divide between Ham's Fork and Twra 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 



Eange. 

 Cafion'in Bear Eiver Eange, back of Smithfield. 

 Bear Eiver, 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. 



