Account of the Kaatskili Mountams. 15 
Between the village and the mountain, the country is al- 
tered in its appearance. Near the western end of the bridge, 
which crosses the Kaatskill at the village, a hill rises to the 
height of 150 feet. The rocks which compose this hill are 
much more compact than those near the river. They have 
a dark blue colour and bear a much stronger resemblance 
totrap. Halfa mile west of this, a ridge of land rises to the 
height of fifty feet, when the country changes to Carbonate | 
of Lime. These rocks are compact, and filled with petri- 
factions of the clam, entrocite, &c. often in so great quanti- 
ties as to compose one sixth of the rock. On the surface of 
the Limestone tract, I observed several specimens of red 
Jasper. 
Sulphurous Spring. 
On the bank of the Kaaterskill (in the limestone region 
which is about four miles in breadth,) there is a sulphurous 
spring,* which is covered by the stream when the water is 
high. The water of this spring is so strongly impregnated 
with sulphur, as to alter the colour of the stream for some 
distance after its union with it. It has a strong sulphurous 
taste, several rods below the junction of these waters. Whea 
the stream is low the atmosphere around the spring is strongly 
impregnated with the odour of Sulphuretted Hydrogen Gas. 
1 have been informed that a large piece of native sulphur, 
was found near this spring a little below the surface. 
Slate and Sand Stone tract. 
Two miles from the base of the mountain, the Limestone 
region terminates. Sand Stone immediately appears. The 
earth here assumes a more reddish appearance, and cen- 
tinues of this colour to the mountain. The sand stone ter- 
minates at the base of the mountain. As you ascend the 
mountain, Slate begins to appear resting upon the sand stone 
below, varying in its strata from nearly horizontal to an angle 
of 30°. It contains too much argil to be useful in building, 
and after exposure to the air is easily broken. ‘The region 
* T learned the facts relative to this spring from a Gentleman who had 
ae visited it. The waters of the stream were so higli as fo prevent my 
xamining it when I last made an excursion to the Kaatskill Mor intains. 
