WARREN COUNTY. 
193 
Recapitulation. 
The principal facts comprising the geology of Warren county, may be summed up thus : 
1. The Primary system of rocks occupies the entire county, with the exception of Queens- 
bury, a small field of Calciferous sandstone passing into the Birdseye limestone at Caldwell. 
2. The main rock is gneiss, which runs through the county in parts of four parallel ranges 
of mountains, nearly from southwest to northeast, all of which reach Lake Champlain where 
they terminate. 
3. Granite, primitive limestone and serpentine, occupy, as it regards space, a subordinate 
place, appearing at and around the bases of the mountains ; the former of these rocks belongs 
to that variety which furnishes the porcelain clay, being eminently disposed to disintegration 
and decomposition. 
4. Primitive limestone occurs in every town or township in the county, and is sufficiently 
pure to be used for quicklime. 
5. The serpentine marble is abundant in Warrensburgh, and forms a variety, which, if 
taste and fashion were in its favor, would become an important article of commerce. 
6. Of the New-York system of rocks, the Potsdam sandstone, Calciferous sandrock, 
Trenton limestone, the marble of Isle La Motte, and Utica slate, are well developed in the 
rocky gorge at Glen’s-Falls, or in the immediate vicinity. Each of these limestones are more 
or less important in an economical point of view. 
7. Peat exists abundantly in the county, in a state suitable to be employed as fuel or as a 
manure. 
8. The other superficial deposits consist of sand and gravel, which, in many parts of the 
county, have accumulated in hills of considerable elevation, or have lodged far up upon the 
southern declivities of the mountains. The most important are strictly those hills which are 
denominated drift, by the best authorities of the day. 
Geol. 2d Dist. 
25 
