106 NEW YORK STATE MUSEUM 



has an average height of 150 feet. The clays, so far as could be 

 ascertained, lie on the upturned edges of the Utica shale. 



At the rear of A. S. Staples' yard hardpan underlies the clay. 

 The overlying material at this locality consists of sand and gravel 

 in many instances stratified and sometimes cross-bedded. The 

 sand in some spots is 10 to 15 feet thick and fine enough to 

 be blown by the wind. 



At Port Ewen the clay is mostly blue, resting on a mass of 

 hardpan, and in a few places on the glaciated rock surface. 

 According to Mr. Kline, of Port Ewen, the clay around the village 

 is nowhere over 18 feet in actual thickness and is underlaid 

 by hardpan. A point worthy of notice is the difference in level 

 of 50 feet between the terrace at Port Ewen and at Glasco. 



It has been suggested by Dr. F. J. H. Merrill that this may be 

 due to the fact that when sediment is deposited in the basin its 

 edge would be higher than the center. The Quaternary forma- 

 tion broadens on toward the west, and Port Ewen would be a 

 point on the basin's edge while Glasco is near the center. 



In this connection the following well records are of interest : 

 A boring made on the property of Isaac Tamney, at Eddyville, 

 showed 



Sandy loam 

 Quicksand . 

 Blue clay . . 

 Gravel .... 



90 



10 feet 

 TO " 

 10 " 



In boring another well at the same locality the following strata 

 were passed through : 



Yellow clay 10 feet 



Blue clay 137 " 



Gravel 5 * 



152 " 



