:l I 
NEW YORK. 247 
I The cost of fuel in the Champlain Valley and the distance from good 
Real markets will probably prevent any great development of the 
enient industry in the Chazy district, though the limestone itself is 
hell adapted to cement manufacture and good clays are obtainable. 
THEN TON L IMES TONE. 
DISTRIBUTION. 
The Trenton limestone, including the Black River and Birdseye or 
Lowville limestone, is widely. distributed throughout New York State, 
ppearing in the valleys of Lake Champlain, upper Hudson River, 
Mohawk River, and Black River, in all of which it is an important 
[uarry stone. It occurs also in the southern part of the State, but 
He outcrops in that district are so small and scattered that they may 
>e disregarded. 
Along the shores of Lake Champlain the Trenton limestone is 
xposed at various points, being quarried more or less extensively on 
sle la Motte, at Plattsburg, and on Larabees Point and Crown 
roint. The most important series of outcrops, however, are along 
ilohawk and Black rivers and in the vicinity of Glens Falls. 
The belt which is quarried near Glens Falls enters the State from 
Vermont, in northern Washington County, and passes southward 
hrough West Haven and Whitehall, close to the line of the Delaware 
Ind Hudson Railroad. A short break in the area occurs at Fort Ann, 
>eyond which the limestone belt passes south to Sandy Hill, then west 
o Glens Falls, where it again turns south to Saratoga. In all this 
listance it lies close to railroads, and in places is also near the canal, 
t is extensively quarried for Portland cement at Glenns Falls and 
or lime and building stone at Sand}^ Hill, Glens Falls, and other 
>oints. 
In the lower Mohawk Valley the areas covered b}^ the Trenton 
imestone are too irregular to be readily described/' It is sufficient 
o say that the Trenton outcrops extensively in the vicinity of Cranes- 
ille, Amsterdam, Tribes Hill. Yosts, Sprakers, Palatine Bridge, St. 
Fohnsville, Dolgeville, and Little Falls. It is quarried at many of 
hese points for lime or building stone. It should be noted, however, 
hat another limestone — the Calciferous or Beekmantown limestone — 
^Iso occurs at many of the points named, underlying the Trenton 
imestone. This Calciferous limestone, however, is usually a very 
mpure rock, high in magnesia, and should therefore be carefully dis- 
inguished from the Trenton, which is normally very low in magnesia. 
The most extensive area of Trenton limestone in the State remains 
X) be described. This area lies mostly in Oneida, Lewis, and Jefferson 
a The distribution of the Trenton limestone throughout much of its range in the Mohawk Valley and 
idjoiniug regions is described in detail in n paper by N. H. Darton on the "Geology of the Mohawk 
/alley," published in the Thirteenth Annual Report of the New York State Geologist, pp. 407-430. 
