640 E. B. BRANSON 



the North Fork of Little Wind River, 27 miles to the northwest, 

 and on Bull Lake Creek, 35 miles to the northwest. On Bull Lake 

 Creek it is 38 feet from the bottom and 3 feet 6 inches in thickness. 

 This is probably the same bed that Blackwelder describes as 

 occurring in Dinwoody Canyon 29 feet 8 inches from the bottom, 

 2 feet 2 . 5 inches thick, and containing Lingulodiscina utahensis. 

 Wherever the bed was examined it contained fish remains, and 

 Orbiculoidea utahensis in abundance. 



In Big Popo Agie Canyon a 4-inch phosphate bed, as it was 

 measured, but probably much thicker, occurs 58 feet from the 

 bottom, and 6 miles southeast along the strike a bed 2 feet thick 

 occurs 54 feet from the bottom, and is followed 10 inches higher 

 by 14 inches of phosphatic shale. About 150 feet higher a 

 5-foot bed of gray phosphatic limestone is present in Big Popo 

 Agie Canyon, and 6 miles southeast along the strike a 5-foot bed 

 occurs at the same horizon. This is the bed that Blackwelder 

 describes as occurring 12 miles west of Lander— " Brownish-gray 

 oolitic and nodular phosphate rock full of Productus subhorridus 

 and other fossils (42.4 per cent tricalcium phosphate)" 1 — 4 feet 

 7 inches thick. This bed is readily distinguished from the lowest 

 bed by its fauna. It contains Producti, spirifers, and Spiriferina 

 pulchra in abundance, while the lower bed contains none of these. 



The Embar limestone is well exposed in Little Popo Agie Canyon 

 and the following description was worked out in 1913: 



32. Greenish sandy shales and limestones : covered with talus and 



with a bed outcropping here and there 75' to 100' 



31. Light-gray, highly siliceous limestone with the silica in druses 

 as quartz and not as chert; this is the limestone that forms 

 long dip slopes on the east side of the Wind River M ountains . . 29' 3 



30. Light-gray, cherty limestone io' 2 



29. Dark phosphate 4 



28. Gray, cherty limestone 5' 7 



27. Dark-gray phosphate speckled with white 7 



26. Green shale 



25. Phosphate, black to dark-gray 



24. Dark-gray, siliceous limestone 3' 



1 Eliot Blackwelder, " Reconnaisance of the Phosphate Deposits in Western 

 Wyoming," U.S. Geol. Surv., Bull. 470, p. 477. 



