534 The Upper Devonian Deposits of Maryland 



This is the most conspicuous conglomerate in the Oakland anticline and 

 develops a series of knohs where it outcrops. It has been described by 

 Prosser as the Avilton conglomerate and is probably the same as the upper 

 conglomerate of the preceding sections. A less conspicuous conglomeratic 

 sandstone occurs 162 feet vertically above the preceding. A third con- 

 glomeratic sandstone occurs at the top of the section 900 feet above the 

 lower conglomerate and develops a conspicuous series of hills in the 

 region. It is underlain by red strata of Catskill type. 



The Jennings-Catskill contact was placed by Prosser 50 feet above the 

 upper conglomerate in this section. The writer prefers to place it at the 

 base of the red stratum found beneath the upper conglomerate because of 

 the Catskill-like character and considerable thickness of the red stratum, 

 the slight thickness of the upper gray beds associated with the con- 

 glomerate, and the absence of observed marine fossils above the horizon 

 suggested. Similar gray beds are not infrequent in the lower part of the 

 Catskill in the eastern sections. 



