771 Ni:w YORK BTATE ICUSEUlf 



nr under them al ral points. Borings were made by the 



wri swamp a1 a point two miles north of Union 



ings but no marl was found. 



Chautauqua county 1 



The only lime deposits are a few scattered hods of marl. The 

 most important is on Cassadaga hike, and a Portland cement plant 



was erected at this point several years ago, but is now clused 

 down. 



Clinton county 2 



Calcifcrovs. Rocks of this age are ahundantly exposed in 

 Champlain, Beekmantown and Peru townships. The rocks are 

 usually blue gray, massive, sandy dolomites. Owing to their 

 sandiness they have little value for the manufacture of lime or 

 cement. 



The Trenton and Chazy limestones occupy a broad holt which 

 extends along the western side of Lake Champlain from Peru 

 northward to the Canadian boundary, the western edge passing 

 close to "West Chazy, Chazy and Coopersville. 



Chazy limestone. This limestone is well exposed at the village 

 of Chazy as well as in other parts of Chazy township, specially 

 just north of Plattshurg, and on Bluff point tw T o miles south of 

 the latter place, whence it extends south into Peru, where the 

 lower portion of the formation is well shown. The aggregate 

 thickness of the Chazy limestone at Chazy village is 740 feet, 

 while at Valcour it is said to be 800 feet. The rock is quarried at 

 a number of points for obtaining marble, rough building stone 

 or stone for lime. 



Black river limestone. The rocks of this group occur as mas- 

 sive dark colored beds, but are well exposed at numerous points in 



1 Hall. James, (see Geo]. 4th (list. N. Y. p. 493) 



2Cushinjr, II. P. Geology of Clinton county, [see 13th an. rep't N. Y. state 

 geoL p. 613) 



Faults of Chazy township, Clinton co. (see Bui. geol. soc. Am. 6: 285) 



Geology of Band Hill and vicinity, Clinton county, [see 19th an. 



Wp*t N. Y. state geol. p. 39) 



Krnmons, Kbenczer. Geol. 2d dist. N. Y. 1842. 



