316 W. B. CLARK — UPPER CRETACEOUS FORMATIONS OF NEW JERSEY. 



Page 



Character of materials 337 



Strike, dip, thickness 337 



Stratigraphic relations ... 337 



Divisions 338 



General characteristics. , 338 



Sewell marls 338 



Vincentown lime-sands 338 



Fossils 339 



Manasquan formation 339 



Name 339 



Areal distribution 340 



Character of materials 340 



Strike, dip, thickness 340 



Stratigraphic relations 341 



Fossils. 341 



Shark River formation , 341 



Name 341 



Areal distribution 341 



Character of materials 341 



Strike, dip, thickness 342 



Stratigraphic relations 342 



Fossils 342 



Interpretation of the sedimentary record 342 



General character of the deposits 342 



Geographical variation in the materials 344 



Probable marine conditions as revealed by the deposits 346 



Probable continental relations as revealed by the deposits . 348 



Subsequent structural and chemical changes in the strata 349 



Interpretation of the faunal record 350 



Correlation of the formations within the province. 350 



Correlations of the deposits with those of other areas 352 



Economic products 355 



Summary 357 



Introduction. 



The present paper presents an outline of the results obtained by the 

 authors in a study of the post-Potomac Cretaceous formations in the states 

 of New Jersey, Delaware, and Maryland. The work constitutes a part 

 of a series of investigations which has embraced the whole sequence of 

 Cretaceous-Tertiary formations throughout this area, and which is still 

 in progress. Considerable advance has already been made both in the 

 interpretation and cartographic representation of the other divisions of 

 the series, and they will shortly be made the subject of further contribu- 

 tions. 



