MARL. 85 



Northeast, Pine-Plains, Stanford, Redhook and Milan. They are often associated with peat. 

 In some cases the stratum of peat is three or four feet in depth ; this is succeeded by a stra- 

 tum of peat and marl from three to four feet ; and lastly, by a stratum of pure marl of two or 

 three feet. The beds of marl in this county are mostly made up of shells. 



Genesee County. There are several deposits of marl in the vicinity of Batavia. There 

 are also extensive marl swamps in the neighbourhood of Le Roy. 



Greene County. The tovnis of Catskill and Coxsackie contain beds of rich marl. A 

 specimen from the latter has a white colour, is very friable when dry, and is nearly a pure 

 carbonate of lime. The following are the results of the analyses of two samples — No. I. being 

 from the farm of Mr. Van Bergen, near Coxsackie ; No. II. from the vicinity of Catskill : 



I. IL 



Carbonate of lime, 97.32 91.75 



Insoluble matters (principally silica and alumina), 2.15 8.25 



Oxide of iron, with vegetable matter, 0.53 trace. 



Madison County. This county contains many valuable localities of marl. There is a • 

 bed of it near the village of Chittenango ; and Mr. Vanuxem informs us that the Cowasalon 

 swamp, which contains about ten thousand acres, is a vast accumulation of marl, of unas- 

 certained depth.* Besides this, most of the ponds in this county have bottoms of the same 

 substance. 



Monroe County. Rich deposits of marl occur in this county, especially in the towns of 

 Riga and Wheatland. In the latter of these is a very extensive deposit, which in some por- 

 tions is almost pure carbonate of lime, containing an abundance of shells ; in other places, it 

 is mixed with earthy matter. This deposit is three miles in length, and extends into Living- 

 ston county. In Riga, the marl is of sufficient purity to be burned into lime. 



In Montgomery County, earthy marl occurs abundantly near Canajoharie, Fort-Plain and 

 Fonda. 



Niagara County. Between the mountain and lake ridges, shell marl is an abundant 

 product ; and the same remark applies to the region along the Tonawanda creek, in the 

 southern part of this county. In a swamp five miles east of Lockport, there is an extensive 

 deposit. It has not yet been used there for agricultural purposes. 



In Oneida County, peat and marl occur in the town of Clinton ; and in Otsego County, 

 deposits of marl are found in the southern part of the town of Cherry-Valley, where it is 

 deposited by streams flowing through a drab limestone. There are several similar deposits 

 in the northern part of the latter county. 



» New-York Geological Reporls, 1839. 



