Eepoet on the Mines and Mining Exhibit. 



347 



eral species of Cretaceous leaves have been found in the clay. At 

 Fresh Pond the clay beds crop out along the shore for a distance of 

 half a mile. They are brovraish and red in color, the latter being 

 more sandy. Sand overlies the clay. 



One of the most interesting clay banks is that on Fisher's Island, 

 The clay is of a reddish brown color similar to that on Centre Island, 

 and in its original condition was horizontally stratified and overlain by 

 twenty to thirty feet of laminated sand. But the whole deposit has 

 been disturbed by the ice sheet passing over it, and the clay layers 

 have been ground and crumpled. A thick bed of glacial clay occurs at 

 Southold, and near it is a bed of potter's clay. 



At West Deer Park is a bank of clay twenty feet in thickness, the 

 upper portion of which is yellow and red, while the lower portion is 

 black and burns to a white color. About four miles west of this 

 locality is another bank thirty to forty feet thick of a yellow and red 

 color. Micaceous sand underlies it. The region around East Williston 

 and Plicksville is underlain by clay which is usually encountered a few 

 feet below the surface. 



Staten Island Clays. 



These are chiefly of Cretaceous ages, and outcrop at Kreischerville, 

 Green Ridge and Arrochar. Besides the clays there are several kaolin 

 deposits. These clays are a continuation of the well-known belt which 

 extends across JSTew Jersey. They occur as irregularly shaped masses 

 in the sand, and vary in thickness from ten to sixty feet. 



Beds of glacial clay also occur on Staten Island and are used for 

 brickmaking. 



Analysis of I^ew Yoek Clays. 



By HERMAN VTTLTE, Ph. D. 



LOCALITY. 



< 



S MS 



s 



o 



Glens Falls red clay . . . 

 Rochester red clay . . . . 



Buflealo 



HomellsviUe shale 



Breesport 



Newfleld 



Oakland Valley , , 



Warwick 



East Williston 



West Neck brown clay. 



Southold 



Fisher Island 



West Deer Park 



Farmingdale 



Alfred Centre clay . . . . 



Angola shale 



Elm Point 



Glen Cove 



Little Neck 



Kreischerville 



Kreischerville kaolin. . . 



50.55 

 57. SB 

 64.45 

 62.48 

 51.80 

 37.50 

 53.00 

 69.78 

 61 01 

 59.09 

 53.77 

 59 83 

 68 39 

 53.80 

 65.15 

 62.06 

 70.45 

 62.66 

 54.86 

 82.51 



16.01 

 15.46 

 16.20 



17 77 

 16.78 

 12.21 



54.00 

 83.0 

 16.42 

 19.28 

 22.11 

 20.49 

 24 45 

 23.60 

 28 85 

 15.29 



18 09 

 21.74 

 18.00 

 24 76 

 11.57 



6.96 

 4 88 

 4.55 

 7.04 

 6.79 



5 48 

 6.54 

 9.23 

 Tr. 

 3.39 

 10 90 

 6.16 

 5.40 



i.ra 



97 

 83 

 63 



1.24 

 10.95 

 5.34 



58 



11.68 



3.50 



8.21 

 3.35 

 8.90 

 1.86 

 3.69 

 4.73 



07 



1.66 



0.96 



2.19 



4.22 



0.23 



0.70 



1.01 



3 50 



1 05 



0.84 



79 



0.78 



0.39 



8.60 

 0.69 

 1.88 

 3 64 

 2 04 

 0.69 

 0.10 

 63 

 1.57 

 Tr. 

 0.30 



Tr'. 

 0.78 



6.08 

 6.30 

 6.98 

 4.47 

 7.16 

 4.33 



4!i6 

 6.27 

 4.60 

 6.22 

 9 60 

 8.75 

 6 89 

 8 70 

 5.71 

 6.11 

 6.00 

 2 83 

 8.35 

 2.66 



98.73 

 90.99 

 94.38 



93.43 



100.9 

 97.35 

 93.11 

 98.75 

 99.35 

 98.13 

 96,07 

 99 91 

 97.38 

 92.71 

 99.45 

 84.74 

 93 93 

 98.44 



