LIME AND CEMENT INDUSTRIES 775 



Chazy overlying the Chazy limestone, but outside of the village 

 and in Chazy township it is not very well exposed. According 

 to Cushing it has a thickness of 30 to 50 feet and is a brittle 

 black limestone with a conchoidal fracture. 



Trenton limestone. This is also well exposed in the town of 

 Chazy and in addition in the town of Plattsburg. Cushing states 

 that in the bed of the river just east of the Chazy village 150 

 feet is exposed lying on the Black river limestone, while on Crab 

 island about 200 feet of it can be seen. The lower portion of the 

 Trenton limestone generally exhibits beds of a slaty character 

 and is probably of insufficient purity for any chemical use except 

 that of making common lime and for fertilizing purposes or per- 

 haps Portland cement. Also in northeastern Plattsburg town- 

 ship, and extending into southeastern Beekmantown, the rocks 

 according to Cushing form a series of black slaty limestones which 

 are excellently exposed on Cumberland head. 1 



The Chazy limestone is of high purity and makes a most ex- 

 cellent quality of lime. 



The following is an analysis made by D. H. Newland. 



Silica. , a 72 



Alumina and ferric oxid 39 



Lime carbonate 06 . 24 



Magnesium carbonate 3.92 



100.37 



The quarries are near the railroad and the product can be 

 easily shipped. 



There are several lime quarries in operation in the village of 

 Chazy, the one being- -on the eastern edge of the town and an- 

 other about a mile out (pi. 31). Recently a third quarry 

 has been opened on the southeastern edge of the village, and 

 three limekilns erected. It affords an excellent location for 



1 Cashing:, H. P. Geology of Clinton county, (see i'dth an. rep't N. Y state 

 geo!. p. 5 13) 



