THE FOSSIL FIELDS OF WYOMING 



Half a mile east of Black Buttes we see at top: 

 1st — Shaly sandstone, 10 feet. 

 2cl — ^Argillaceous shales and clay, 7 feet. 

 3d — Coal streak, 3 inches. 



4th — Argillaceous and sandy shale, yellowish, with many 

 dicotyledonous leaves, 1 feet 9 inches. 

 5th — Main coal, 8 feet. 

 6th— Chocolate colored fire clay, 5 feet. 

 7th— Black laminated shale, 1 feet. 

 8th-Coal, 4 feet. 

 9th — Shales and fire clay, 1 6 feet. 



10th— White concretionary sandstone with many fucoids, 

 also IS somewhat cavernous, I 18 feet. Twelve feet of coal is 

 here included. 



The section at Rock Spring shows: 



I St- Main coal 4 ft. 



At 1 1 7 feet depth after passmg hard sandstone, 

 shaly sandstone and clay. 



2d — Coal worked two miles east 4 ft. 



3d —at J 49 feet, coal 3 ft. 4 



48 ft. 4 in. 



