PLATE VII. 



LEGEXD 



Dcvik jjiver Limestone 



S 



rpper Srtltppter-bearing crust IllPJW 



B.ii'ien ciive aetuimilations 



Talus of calciuecl boulclers,, etc. 



m 



Spring 



1 I I I I L 1 1 



SECTION OF THE SALTPETER "CAVE," % MI. NORTH OF THE MOUTH OF INDIAN CREEK, 



ON DEVU-'S EIVEB. 



