446 CHARLES EMERSON PEET 



IV. NEW HAMBURG GRAVEL PLATEAU AND WAPPINGER CREEK 

 STRATIFIED DRIFT. 



A gravel plateau occurs at New Hamburg (46), which has a width 

 in a north-south direction of about one-half mile, and connects with 

 stratified drift which extends upstream to the northeast four miles 

 or more, and spreads out to broader dimensions. It has an eleva- 

 tion at its west edge of 100 feet A. T., and a plain surface which 

 rises upstream; and at Wappinger Falls (47), at an elevation of 140 

 feet A. T., it has a topography which indicates the presence of ice. 

 Farther northeast kames occur in small areas. The edge of this 

 plateau is steep at the northwest side, but farther south, and east of 

 New Hamburg village, it falls off in undulations, which indicate the 

 presence of the ice during its formation. Exposures in this plateau 

 in this lower portion show layers of gravel and sand wiih dips west in 

 the western part, and east in the lower portion of the eastern part. 

 Apparently this gravel and sand grades into clay farther east. It will 

 be noted that this would be upstream as the Wappinger Creek now 

 flows. The easterly dipping layers are interpreted as the fore-set beds 

 (of Davis) and the clay as the bottom-set beds. The westerly dipping 

 layers are interpreted as the back-set beds. Farther upstream, just 

 east of the Print mills, near the point where the surface topography 

 indicates the co-operation of the ice in forming the plateau, gravel 

 and sand in considerable thickness overlie silt and yellow clay which 

 reach 60 feet A. T. or more. Blue clay was observed farther south 

 on the left bank of the creek. The layers of gravel and sand dip 

 west and southwest. 



Low- level terraces: In the village of Wappinger Falls a lower 

 terrace at 40-60 feet is to be seen, and also one at 20 feet. Both are 

 made of gravel 2-3 inches in diameter. Farther downstream a ter- 

 race occurs at 30 feet A. T. 



V. CAMELOT KAMES. 



Near Camelot kames unassociated with the gravel plateau occur 

 in a valley tributary to the Hudson within 20-40 feet of sea-level, and 

 in the immediate Hudson Valley within 60 feet of sea-level. (Fig. 9, 

 No. 48.) 



