732 



FRANK A. WILDER 



Germany:" 



The Hartz (gypsum). 



Stassfurt, Sperenberg ( gypsum 

 and salt). 

 South Tyrol (gypsum). 

 Russia (gypsum, salt)." 



PERMIAN. 



Iowa (gypsum). 



Texas (gypsum). '3 



Kansas (salt and gypsum).''' 



Oklahoma and Indian Territory, 



Black Hills (gypsum)'^ 



CARBONIFEROUS. 



Lower Carboniferous. 

 Mississippian. 



Lower Michigan (gypsum).'* 

 Nova Scotia (gypsum and salt).'^ 

 Virginia (gypsum and salt).'^ 

 Montana (gypsum). '^ 



DEVONIAN. 



None. 



SILURIAN. 



Russia, Baltic provinces (gypsum).^ 



New York (gypsum and salt).""' 

 Ohio (gypsum and salt).-' 

 Pennsylvania (gypsum). "^^ 

 Upper Michigan (gypsum).'^ 



ORDOVICIAN. 



None. 



CAMBRIAN. 



Punjab Salt Range, India.'^ j 



" CredneRjC'/. czV.jpp. 503-11. '3Texas Survey, Third Annual Report, p. 212. 

 '^Geikie, op. cit; p. 853. "'' University Geological Survey of Kansas,Yo\.Y . 



'5 U. S. Geological Survey, Barton's report, loc. cit. 

 ^^ Geological Survey of Michigan, Vol. V (1881-93), Part II, pp. 14-30. 

 '^'^ Mineral Resources of Canada, 1897, pp. 105-11. 



^^ Resources of Southwestern Virginia, Boyd, 1875, pp. 260-304. The reference 

 of Virginia gypsum to the Lower Carboniferous is exceedingly doubtful. 

 '' U. S. Geological Survey, Benton Folio, p. 6. 

 '° Geikie, op. cit., p. 789. 



'^^ New York Geological Stirvey, Vol. Ill, No. 15, p. 550- 

 '^^ Geological Survey of Ohio, Vol. VI, pp. 691-702. 



-3 Geological Survey of Pennsylvania, Summary Filial Reports, Vol. II, pp. 9x3-15. 

 ^'^ Geological Survey of Michigan, Vol. I (1869-73), Part III, pp. 29-31. 

 '5 Geikie, op. cit., pp. 737-39. 



