BULL. GEOL. SOC. AM. 



VOL. 8, 1896, PL. 16 





V 



\ 



THt DEVILS 



'#'* 



\ 



Scale 



Contour Interval, 5 feet 



* F? 



w to • , 



GAY HEAD CLIFFS 



From unpublished chart of United States Coast and Geodetic Survey made in 1888. Heavy black lines 

 represent outcrops of Neocene (Miocene and Pliocene) ; parallel lines, outcrops of Pleistocene older than 

 the last glacial epoch ; remainder of the cliffs mainly Potomac with marine Cretaceous. 



