440 



CHARLES S. PROSSER 



of what he called the Corniferous limestone, and the quarries at 

 Sandusky and Delaware are given as localities of its occurrence. 1 

 It will be remembered that in this same volume Dr. Orton, in his 

 "Report on the Geology of Franklin County," named the upper 

 division the "Delaware limestone," "from its occurrence at Del- 

 aware." 2 In a paper describing fossil plants from the Corniferous 

 limestone of Ohio, published by Dr. Newberry in 1889, occurs 



Fig. 3. — Contact of Columbus and Delaware limestones in Lake Shore & Michi- 

 gan Southern Railroad quarry two and one-half miles northeast of Castalia. The col- 

 lecting-bag is on top of the Columbus, and the hammer indicates the superjacent shale. 



■Contact 



the following sentence: "They [the fossil plants] are all from the 

 Delaware limestone, the upper division of the Corniferous." A 

 little farther on he speaks of "the white or Sandusky limestone below," 

 apparently applying this name to the lower division of the Corniferous 

 limestone; while he also stated that "the Delaware limestone is 

 much darker and more earthy than the lower division of the Cornif- 

 erous, and it is evident that it was deposited in shallower water when 



1 Ibid., Vol. Ill, Part i (1878), p. 11. 2 Ibid., p. 606. 



