84 STUART WELLER 



In conclusion, the following summation of results in connection 

 with recent investigations upon the Cretaceous formations and faunas 

 ofJNTew Jersey may be made. 



i. Cook's classification fully differentiated all the beds of the 

 "marl" series that have been recognized since his investigations were 

 carried on, but the " clay-marl" series has been more fully divided 

 since his work was completed. He was in error, however, in applying 

 his classification to the southern counties. 



2. In the discrimination of beds, Clark's classification is in the 

 main that of Cook, his contribution being a modernization of the 

 older classification by the introduction of geographic formation 

 names for Cook's lithologic names, and a grouping of the formations 

 into larger divisions. 



3. In so far as the discrimination of beds is concerned, Knapp's 

 differentiation of the "clay-marl" series is a distinct advance over 

 the earlier classification. 



4. A study of the paleontology of the "clay-marl" formations of 

 Knapp shows them to be as fully differentiated by their faunas as 

 by their lithologic characters. 



5. For both faunal and stratigraphic reasons, the "indurated 

 green earth" of Cook is separated from the Red Bank sand, and is 

 recognized as a distinct formation to which the name Tinton beds is 

 applied. 



6. The "yellow sand" is regarded to be of Cretaceous age, as 

 originally interpreted by Cook, and its fauna to be the equivalent of 

 that of the Vincentown lime-sand. 



