416 HO L LICK. 



strata on Staten Island were continuations of those at Perth 

 Amboy and Woodbridge, and that the fossil plants found in 

 them or derived from them would prove to be identical with 

 those of the mainland. Such, however, has not been found to 

 be the case, and this fact has seemed to indicate that some of 

 the strata from which the Staten Island plants were derived 

 may represent a different and presumably a higher member of 

 the Amboy clay series than do those represented at the New 

 Jersey localities mentioned. 



Many of the species are identical, but a number of those 

 found on Staten Island have not yet been discovered in the 

 New Jersey clays, although these have been quite extensively 

 exploited and hundreds of specimens have been collected from 

 them ; and further, some of the species most common in New 

 Jersey are conspicuous by their absence or rarity on Staten 

 Island. 



As is well known the Cretaceous clays of New Jersey ex- 

 tend across the State with a general northeast and southwest 

 strike and a dip towards the southeast of about fifty feet to the 

 mile. Those which outcrop furthest to the northwest are 

 therefore the lowest or oldest of the series. If a geological 

 map of New Jersey be examined and the trend of the clay out- 

 crops be theoretically extended on to Staten Island, it may be 

 readily seen that the lower beds, represented by those at Wood- 

 bridge, Sayreville, Perth Amboy and possibly South Amboy, 

 would strike the western shore of Staten Island in the vicinity 

 of Tottenville and Kreischerville, while the upper beds, repre- 

 sented by those in the vicinity of Cheesequakes creek, would 

 strike along the southern shore of the island from Tottenvnlle 

 to Arrochar. 



This probability is further strengthened by the fact that marl 

 bed fossils have been found in the moraine at the latter locality, 

 showing that strata even higher than the upper members of the 

 clay series are or once were represented there. 



From a consideration of these facts and other similar ones in 

 connection with the Cretaceous clays on Staten Island, Long 

 Island, Block Island and Martha's Vineyard, the name " Island 



