MARYLAND GEOLOGICAL SURVEY. 



MIOCENE, PLATE IV. 



Fig. 1.— cliffs containing beds of DIATOMACEOUS earth, LYONS WHARF, 



CALVERT COUNTY. 



Fig. -i.-DIATOMACEOUS EARTH PIT OF NEW YORK SILICITE COMPANY, LY'ONS WHARF, 



CALVERT COUNTY. 



VIEWS OF MIOCENE SECTIONS. 



