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NEW YORK STATE MUSEUM 



or pegmatic dikes. In many places they constitute a large propor- 

 tion of the formation in which they occur. They doubtless vary 

 in age, but for the most part seem to belong to the later period of 

 metamorphism. Many of them are massive and largely free from 

 foliation. They no doubt have a complex origin between simple 

 aqueous segregation on the one side and true igneous intrusion on 

 the other. 



Summary of formations 



Group a Quaternary deposits 



(i) Glacial drift 



Till and modified drift, extra 

 marginal outwash, sands and 

 gravels, etc. 



Occurs as a surface 

 mantle over nearly all 

 of the region under 

 discussion, except the 

 immediate sea margin 



UNCONFORMITY 



Group b Tertiary and Cretaceous deposits 



(2) Tertiary outliers 



(a) Pliocene littoral deposits 



(Bridgetons?) 



(b) Miocene "fluffy" sand (Beacon 



hill) 



(3) Upper Cretaceous beds 



(a) Lignitiferous sand (marl series) 



(b) Matawan beds (clay marls) 



(c) Raritan (clays and sands) 



Confined to Long Is- 

 land, Staten Island 

 and the New Jersey 

 coast 



UNCONFORMITY 



Group c Jura-Trias formations 



(4) Palisade diabase intrusion ^ Confined to the west 



(5) Newark series of conglomerates, I side of the Hudson 

 sandstones and shales [ south of the High- 

 lands 



