FOX HILLS AND LOWER MEDICINE BOW 



unit in cither the text or the maps, these authors suggested its presence, as shown 



in the foUowing quotation :' 



"The Fox Hills sandstone of eastern Wyoming is almost certainly represented in the uppcr- 

 most part of the Lewis shale, [and] in the lower 500 feet of the Medicine Bow formation. . . ." 



* Approximate. 



FiQ. 2 — Late Cretaceous and early Tertiary formations in the Hanna Basin, Wyoming. 



Since this report Dobbin and Reeside have described several sections in this 

 region in wliich they encountered distinctive faunas of the Fox Hills type in the 

 transition beds between the marine Lewis shale and the non-marine IMedicine Bow 

 formation." The Fox Hills invertebrates, including the diagnostic Sphenodiscus 



' Dobbin. C. E., Boweu, C. F.. and Hoots, H. W., ibid., 23. 



' Dobbin, C. E., and Reeside, John B., Jr., The Conlact ofthe Fox Hilla and Lance Formations, U. S. Geol. Survey Prof. 

 Paper 158-B. 21, 22, 1929. 



