[Annals N. Y. Acad. Sci. , Vol. XII, No. 4, pp. 91 to 102, July 7, 1899 j. 



SOME FEATURES OF THE DRIFT ON STATEN 

 ISLAND, N. Y. 



Arthur Hollick. 



(Read October 17, 1898.) 



[Plate I.] 



CONTENTS. 



Page. 



Introduction , 91 



General geological conditions 91 



Terminal moraine 92 



Earlier descriptions 92 



Location and extent 93 



Structure 93 



Character of the material 94 



Lists of fossils 94 



I. Palseozoic ' 94 



II. Mesozoic 98 



Summary and Conclusions •. 99 



INTRODUCTION. 



General Geological Conditions. 



In order that the full significance of many of the features of 

 the drift on Staten Island may be appreciated it is necessary 

 to have at least a fair idea of the general geological conditions 

 which prevail there. Topographically the island may be 

 roughly divided into a hill region at the north and east and a 

 plain region at the south and west. The hill region is limited 

 on the east and south by a ridge of serpentine, which extends 

 from the point nearest to New York City, at New Brighton, to 



(91) 

 [Annals N. Y. Acad. Scl, XII, July 7, 1899 — 7.] 



