MARYLAND GEOLOGICAL SURVEY. 



MIOCENE, PLATE VII. 



Fig. 1.— view of drum cliff, near JONES WHARF, ST. MARY S COUNTY, SHOWING 



THE CHOPTANK FORMATION. 



Fig. 2.— ANOTHER VIEW OF DRUM CLIFF, SHOWING THE CHOPTANK FORMATION WITH 

 THE INDURATED LAYER AT BASE OF SECTION. 



VIEWS OF MIOCENE SECTIONS. 



