256 
[Assembly 
1. HUDSON SLATE GROUP. 
This group consists of a series of slates, shales, grits, and limestones, 
with silicious and calcareous breccias, and hypogene and plutonic rocks. 
Some of the grits, or graywackes as they have been called, of this 
group, are used as building stone, and some of them are well adapted 
for such uses. They are easily quarried and come out with smooth 
faces along the joints of the rocks. 
Coal has been sought in many places in the Hudson slate group, in 
consequence of the blackness of many of the beds of slate and shale, 
and because thin laminae, and small masses of anthracite have been 
found. There are such localities in Marlborough, New-Paltz, Platte- 
kill and Marbletown, in Ulster county; and Coxsackie, in Greene coun- 
ty, where excavations have been made, and high expectations of the 
value and productiveness of the mines entertained. It is perhaps su- 
perfluous to add, that no valuable quantity of coal has been found, or 
will, probably be found in this group of rocks. 
A sulphur spring occurs on the land of Mr. J. Hasbrouck, about one 
mile west of Springtown, in the township of New-Paltz, Ulster county. 
It rises from the alluvial gravel over the slate rock in the bed of a small 
brook, and it is believed that if the brook should be excluded, the water 
would be strongly hepatic, and might be applied medicinally to the cure 
of such diseases as are benefited by hepatic waters. Gas rises in bub 
bles at intervals of a few seconds from the bottom of the spring. The 
spring is near the base of the Shawangunk mountain, and nearly oppo- 
site Buntico Point.* 
On the east of these minor axes, the second main axis of elevation takes its rise from 
High Point, which is a high cliff of grit rock on the main fault, and ranges thence 
northeastward, more or less broken and dislocated by minor transverse and oblique 
faults, and diminishing in height, until the Shawangunk mountain, and its grits, which 
envelope most of the higher parts, entirely disappear below the limestones and tertiary 
deposits at and near Rosendale. Several high points with mural fronts and ends, are 
seen between High-Point and Springtown, as Sam's-Point, Great Mogunk, Buntico- 
Point, &c. all of which are caused by faults along the main fractures of the mountain. 
* Buntico-Point is a high point or precipice on the Shawangunk mountain, and is 
one of the old landmarks of the count}'-, as well as most of the other high points of 
those mountains to which lines were run in laying out the " Patents." Buntico, in the 
language of the aborigines, is said to mean a spotted cow, and Buntico-Point took its 
name from its having been one of the landmarks of a tract of land purchased of the 
Indians in exchange for a spotted cow. Messrs. Van Wagenen, of New-Paltz, and J. 
Hasbrouck, of Springtown, gave me much local information relative to the objects of 
the survey. 
