Account of the Kaatskill Mountains. 13 
an inclination of a few degrees, to a horizontal position, ae 
have one fissures filled with veins of Carbonate of Lim 
a white colour, translucent, and presenting a fine oteteh 
ization. “The Wacke varies in colour from light to dark 
-brown, frequently Pee pai indurated clay. Ascending 
the hill, veins of Flint, Hornstone and Pitchstone appear on 
the curiae’ or in veins in'the Wacke: ‘The Pitchstoné is 
of a black and dark green colour, and more abundant than 
e Flint or a oahe etn 
ae 
Petrifactions. 
“On the Keatskill ereek three miles above the town, is a 
— ibs spent 20 ent in tae South of this fall, the 
cite, &c. entrocites vary in length from one to six 
inches, though rey sometimes exceed this. I saw imbed- 
ded in one of the rocks, one of fifteen inches in length. The 
lie on the surface and in an oblique and right angled posi- 
tion. As these petrifactions are siliceous and the matrix 
limestone, they rise above the surface, owing to hee greater 
attrition of the rock. The entrocites commonly pear 
straight, and resemble oe united to each other. nes 
times they assume a twist earance, as if struggling to 
escape when first Ga betdote= I observed here several pie- 
ces of Madrepore adhering to the rock, or imbedded in it, 
weighing from ten to twenty pounds. In these rocks are 
veins of Flint, of several inches in width, partially covered 
with crystals of Quartz. The rocks forming the bed of the 
stream — to have been rent asunder, leaving cavities of 
sev breadth, and ten in depth, in which, when 
the stream is very low, most of the water runs. 
Diamond Hill. 
At the 
creek, is a small elevation called Diam 
et “number: of Sarto crystals recrys in it. The "wae 
which compose this hill, bear a strong resemblance to those 
in the hill between the river and the village, only they are 
‘termination of Main-Street, the me of nd 
‘om the 
