BULLETIN 16 5, UNITED STATES NATIONAL MUSEUM 



of New Jersey. 2 The arrangement of the stratigraphy shown in 

 table 1 was adopted by the United States Geological Survey and was 

 proposed by Knapp and Kiimmel. 



Weller, after a critical study of the faunas, concluded that two 

 main divisions would more exactly represent the true history of the 

 formations. The close relationship of the faunas led him to place 

 in one group, designated the Ripleyian, all strata from the Magothy 

 through the Tinton sand. The higher faunas, including the Homers- 

 town marl, Vincentown sand, and Manasquan marl, he grouped 

 under the term Jerseyia?i, as their typical development is in New 

 Jersey. Weller recognized the Jerseyian as of Upper Cretaceous 

 age on the basis of the close relationship of the faunas with those of 

 the Maastrichtian division of the Danian series of the Cretaceous 

 of western Europe. 



Table 1. 



-Cretaceous and Eocene formations in the Coastal Plain of New 

 Jersey 



System 



Tertiary. 



Cretaceous. 



Series 



Eocene. 



Upper Cretaceous. 



Formation 



Shark River marl 



(Unconformity.) 



Manasquan marl. 



Rancocas group: 



Vincentown sand 



Hornerstown marl 



Monmouth group: 



Redbank sand with Tinton sand. 



Navesink marl 



Mount Laurel sand 



Matawan group: 



Wenonah sand... 



Marshalltown formation 



Englishtown sand 



Woodbury clay 



Merchantville clay 



Magothy formation 



Raritan formation 



C. Wythe Cooke and Lloyd W. Stephenson 3 focused attention on 

 the question of the age of the Vincentown and associated Upper 

 Cretaceous formations. The abstract of their paper presented briefly 

 the question at issue and the basis upon which the authors reached 

 the conclusion that these formations should be placed in the Tertiary 

 instead of the Upper Cretaceous : 



Three formations of the coastal plain of New Jersey, the Hornerstown marl, 

 the Vincentown sand, and the Manasquan marl, which have heretofore been 

 referred to the Upper Cretaceous series, are, on the basis of a new analysis 

 of their contained fauna and the transgressive overlap of the Hornerstown 



2 Weller, Stuart, New Jersey geological survey, vol. 4, 1907. 



8 The Eocene age of the supposed late Upper Cretaceous greensand marls of New Jer- 

 sey. Journ. Geo!., vol. 36, no. 2, pp. 139-149, 1928, 



