UPPER CRETACEOUS. 195 



The Patapsco formation is in all probability to be correlated with the 

 Fuson formation of the Black Hills while it represents a part of the marine 

 Lower Cretaceous of the western Gulf and Pacific coast regions. 



The flora according to European standards has a marked Albian facies, 

 presenting many points in common with the Albian of Portvigal described 

 by Saporta, several species as well as many genera being identical. 



Upper Cretaceous. 



The Upper Cretaceous deposits of Virginia have been observed only in 

 deep- well borings near the eastern border of the Coastal Plain, the Lower 

 Cretaceous being directly overlain unconformably along the line of outcrop 

 by the overlapping Tertiary formations. The senior author of this report 

 in discussing the Upper Cretaceous of the Atlantic border region says :" 



"LTpper Cretaceous deposits extend from New Jersey, where they are 

 most extensively developed, northeastward along the ISTew England coast and 

 southward through Delaware and Maryland to the Potomac valley. Strata 

 of this age have been penetrated in well borings in eastern Virginia, but do 

 not appear along the line of outcrop, being overlapped by Tertiary forma- 

 tions. In North Carolina Upper Cretaceous deposits again appear, and 

 cover a wide area to the south of the Hatteras axis. 



"The Earitan formation (clay, sands, gravels) of the northern part of 

 the Coastal plain evidently represents the earliest phase of Upper Cretaceous 

 deposition, these beds overlying the Lower Cretaceous strata, where exposed, 

 with a marked unconformity. Beds of similar age do not occur in ISTorth 

 Carolina. 



"The overlying Magothy-Matawan formations (sands, clays, lignitic and 

 glauconitic beds), which outcrop throughout the area from the Potomac 

 basin northward to the islands off the New England coast, are represented in 

 North Carolina by the Black Creek formation (sands, clays, lignitic and 

 glauconitic beds), the same fauna and flora characterizing the deposits in 

 both areas. The minor subdivisions established in New Jersey, where these 

 formations are best developed can not be recognized elsewhere, and the 

 changes in physical conditions bringing about the differentiation of faunules 

 there described were evidently only local. 



"The Monmouth formation (glauconitic beds, sands, clays) characterized 

 by the introduction of Belemnitella americana and other forms can be traced 

 through New Jersey, Delaware, and Maryland, and again reappears in North 



«0p. cit. pp. 047-64S. 



