CLAY DEPOSITS IN OLDER SYSTEMS. 209 



A somewhat similar appearing deposit has also been observed 

 near Amsterdam, Hunterdon county, on the property of Mr. 

 Rapp. It lies in a little hollow, near the road from Amsterdam 

 to the Delaware river. A small opening was made here some 

 years ago, and a little clay shipped. An analysis of this clay is 

 given in Chapter XIX, under the head of Hunterdon county. 



Within the region which was covered by the ice sheet of the 

 last Glacial epoch, the surface of the Highlands was in general 

 severely eroded and all residuary material removed. The rocks 

 there, where outcropping on the surface, as well as where ex- 

 posed beneath their covering of glacial drift, are generally hard 

 and unweathered. Under these circumstances it is extremely 

 doubtful whether any workable residuary kaolin deposits will 

 ever be found in that area. 



14 CL G 



