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NEW YORK STATE MUSEUM 



bands of the sand may be seen separated by layers of clay from 4 

 inches to 1 foot thick. 



In the Terry bank, the top of the terrace is delimited by the 220 

 foot contour line. The clays have accumulated against a per- 

 pendicular wall of the limestone, and there is a topping of over 

 30 feet of sand. The clay bands in this bank are only about half 

 as thick as those in the yard farther south and nearer Rondout 

 creek. 



The dominant southeastward dip of the cross-bedded sands on 

 the south of Rondout creek at Port Ewen, and the northeast direc- 

 tion of the similar structures on the north of the mouth of that 

 stream indicate the radial development of the clays and sands 

 about Rondout through the discharge of the creek into a body of 

 water whose surface was at least 200 feet above the present sea 

 level at this locality. 



For several miles north and south of Kingston and Rondout the 

 200 foot contour line marks the break between the upper surface 

 of the flats of clay, sand, or gravel which encompass the bases of 

 the rocky ridges and lesser hills of bed rock. 



Along the creek west of Kingston, gravels with coarse boulders 

 rise above flood plain level. In a section 30 feet thick, a stratified 

 gravel knob with boulderets up to 2 feet in diameter was seen 

 capped by clays and sands, the summit of which did not rise above 

 the 200 foot line. These coarse cobblestones are doubtless to be 

 attributed to deposition by streams from the melting ice and 

 therefore may be referred to an earlier epoch than that of the 

 clays and sands. 



We return now to the glacial deposits underlying the clays. 



Meadowdale stage. About 1 mile south of Meadowdale on the 

 western border of the Albany quadrangle there is a local morainal 

 deposit with knobs and basins partly till and partly washed 

 glacial drift the stratified components taking on a terraced form 

 between the 280 and the 400 foot contour lines. Deposition evi- 

 dently took place in the presence of the glacier immediately after 

 the retreat of the ice from the New Salem lake barrier. This 

 moraine or kame moraine merges eastward into a broad sand 

 plain at about the 360 foot level. Karnes and ridges of gravel out- 

 line its margin on the north. Across a depression on the east 

 of it another small plain has developed at about the 240 foot 



