610 NEW YORK STATE MUSEUM 



across tlie road from Kilmeyer's hotel. Tlie clay is pure wMte and 

 some of it contains 97^ of clay substance. It is extremely refrac- 

 tory, as shown by the tests given in a later part of the report. At 

 the time of my visit the workings were not deep enough to show 

 the relations of the clay deposit. 



As the Cretaceous clays, kaolins and yellow gravels are a con- 

 tinuation of the belt extending across ISTew Jersey, the history of 

 their deposition is the same.'^ 



The following analysis of the so-called kaolin from Campbell's 

 pit on Staten Island is given in the ISTew Jersey clay report cited 

 above. 



Silicic acid and sand 92 . 70 



AlAandFA 5.70 



H2O 70 



K2O 35 



^9.45 



A point that impresses itself on one's notice is the abrupt change 

 in color which often takes place in the clays of the Staten Island 

 Cretaceous, the same bed at one place being brilliantly colored by 

 iron, while only a few feet from it the clay may be perhaps black, 

 or even nearly pure white. 



The Cretaceous age of the Staten Island clays has been clearly 

 demonstrated by the many specimens of leaves described by Dr 

 Arthur HoUick from these beds. {See " Paleontology of the Cte- 

 taceous formation on Staten Island," Trans. N. Y. acad. sci. 1892. 

 11: 96-104, pi. 1-4. " Additions to the paleobotany of the Cre- 

 taceous formation on Staten Island," Hid. 1892. 12 : 28-39; 

 1-4. " Additions to the paleobotany of the Cretaceous formation 

 on Staten Island," no. 2, Annals N. Y. acad. sci. 11: 415-30) 



In the last of these papers Dr HoUick states that it was previously 

 taken for granted that the clays on Staten Island were continuous 



1 N. J. geol. sur. 1878. G. H. Cook. Clays of New Jersey. 



