1 84 CRETACEOUS PALEONTOLOGY. 



practical use in correlation, and the correlation of that formation 

 must rest upon the evidence of the fossil plants. 



The Hornerstown, Vincentown and Manasquan formations 

 do not, in general, afford SO' extensive faunas as do the lower 

 formations. The period was introduced with a nearly pure 

 greensand marl formation, which, southwest of the point where 

 the Red Bank and Tinton formations can be differentiated, is 

 apparently continuous with the subjacent glauconitic deposits. 

 During the middle portion of the period there was apparently an 

 elevation of the coast, and in the belt which formerly received 

 the deeper-water glauconitic sediments, the shallower-water Vin- 

 centown sediments were deposited. During the closing epoch 

 of the period the coast was again depressed as is shown by the 

 recurrence of the glauconitic sediments in the Manasquan, and 

 with the return of similar conditions a recurrence of the life 

 of the Hornerstown marl is seen in the Manasquan. 



These beds or their equivalents seem to be absent in the Gulf- 

 border region south of Maryland, in fact, no faunas related to 

 the Jerseyian fauna being recognized elsewhere in North America. 

 It is not improbable, however, that certain of the non-marine, 

 higher Cretaceous beds of the west may have been formed con- 

 temporaneously with the marine beds containing the Jerseyian 

 fauna. 



As has been pointed out by Clark, 1 the faunas of this higher 

 division of the New Jersey Cretaceous, referred by him to the two 

 divisions, Rancocas and Manasquan, but considered here as com- 

 prising a single paleontological division, the Jerseyian, show cer- 

 tain affinities with the lower or Maestrichtian division of the 

 Danian series of the western European Cretaceous. The faunas, 

 of the Hornerstown and Manasquan marls are in general too 

 meagre and too poorly preserved to allow of any satisfactory 

 comparison with foreign faunas, neither does the fauna of the 

 arenaceous facies of the Vincentown afford much for comparison 

 with European faunas. A comparison, however, of the extensive 

 bryozoan fauna of the Vincentown limesand with similar bry- 

 ozoan faunas of typical Maestricht beds shows a remarkably 



1 Geol. Surv. N. J., Ann. Rep. State Geol. for 1897, p. 207. 



