792 NEW YORK STATE MUSEUM 



Lime carbonate <, , . 94 . 11 



Magnesium carbonate 1.63 



100.47 



« 



At Lowyille tbe Trenton limestone Is exposed in J. Waters'3 

 qnarry, IJ miles north of tlie town and along the Rome, Water- 

 town and Ogdensbnrg railroad. The upper layers are black lime- 

 stone with calcite spots, while the lower ones which are chiefly 

 used are light gray, finely crystalline stone. 



The composition of Mr Waters's limestone is: 



Silica 3.96 



Alumina ) ^ 



Ferric oxid ■. ) 



Lime carbonate 91.27 



Magnesium carbonate . . ., 3.78 



100.71 

 livingston county^ 



The Helderberg rocks outcrop in the northern part of the 

 county, but quarries are few. The Corniferous limestone has 

 been quarried in the southeast corner of Caledonia township. 

 The marls are perhaps of more importance than the limestones. 

 The Wheatland deposit (mentioned under Monroe county) ex- 

 tends into Livingston, and another is known 1 mile east of Cale- 

 donia. 



One good deposit has been opened up on the property of 

 J. Simpson, 3 miles east of Mumford (pi. 42). The marl runs 

 about 6 feet in thickness, and the upper, 20 inches to 2 feet, con- 

 tains more clay than the lower. At the junction between the two 

 are numerous shells. Below the 6 feet of marl there is said to 

 be 6 feet of blue clay. Mr Simpson's marl has been shipped to 

 Buffalo for the manufacture of carbon dioxid. The following 

 is an analysis of the upper half. 



1 Hall, James. Geol. 4th dist. N. Y. p. 459. 



