M UC STATE MUSEUM 



Blmbk river limestone rests on the Birdseye and derives its 

 n:l i : - occur along the Black river. It is very thick 



I \\ . •, D * ems to be formed of lumpy masses. 

 fa is black, and not over 7 feet thick, being known to 



I foot ti( 

 Trenton lii divisible into two members, viz, a 



con ad B gray, crystalline one. The former 



j 8 | with masses of interbedded slate; 



while the gray is often more massive. The Trenton member first 

 luff at Watertown, and southward from there forms 

 i of terraced hills. Its total thickness is about 300 feet. 

 bonndari< nd from Champlain northwest to the Black 



river at a point 4 miles cast of Watertown, thence to Henderson 

 • BOnth to Ellisburg. The southern boundary passes 

 Dearly northeast from Mannsville in the direction of Adams, 

 Whitesville and Tylerville. While the chief use of the different 

 ■n members has been for building, still it would make an 

 •llent lime. It is quarried at Cape Vincent, Chaumont, Clay- 

 ton, Pamelia, Redwood, Threemile Bay, Theresa, and "Watertown. 



Lewis county 1 



Thr Trenton limestone extends across the county in a north- 



rly direction and follows the line of the Rome, "Watertown 



and Ogdensbnrg railroad. It has been quarried at several locali- 



. among them Leyden, Lowville and Collinsville. 



The Birdseye member is well exposed along the road from 



Port Leyden to Leyden, lj miles south of the former locality on 



land of I Vht Snyder. The rock here is a fine grained, brittle, 



light gray stone, full of calcite eyes. An analysis of it made 



by I >. II. Newland gave: 



i \\hit<-, T. O. Report on relations of the Ordovician and Eo-Silurian rocks 

 in ; of Herkimer, Oneida and Lewis counties, (see 51st an. rep't N. V. 



1 : r'J) ) 

 Vanuxem, Lardner. Geol. 3d dist. N. Y. 1842. 



