CATSKILL DIVISION. 
311 
■bottom of the mountains; while the Catskill division forms the mass of the mountains, 
which were crossed in many places, and showed the same order of superposition for 
its main masses, and great uniformity of character for its subdivisions. Vegetable 
impressions were rather abundant in the grey grits between the two masses of red 
rocks. They bear some resemblance to the woodcuts Nos. 10 and 6. The fucoidal 
remains and curved impressions are abundant in the red shale. Many of the vege¬ 
table remains in the grey grits resemble some species of the lithodendron. 
42. Red shales abound between South-Kortright and Dr. Marshall’s, at the junction of Mar¬ 
shall’s brook and Betty’s brook, in Kortright, Delaware county. The grey grits pre¬ 
dominate in the vicinity of Dr. Marshall’s. 
43. From Hobart to Roxbury, the same rocks, in the same order of superposition, were 
observed as have been described. 
44. A small section of rocks was taken at Stratton’s falls, about two and a half miles south¬ 
west of Roxbury. It is represented, though very imperfectly, in fig. 2, of Plate 6. 
It fails to give, like the original drawing, a graphical representation of the characters 
of the rocks, by having been badly copied. 
1. The upper mass is of the grey grit. 
2. The middle mass is of the red shale, with oblique laminae in some of the layers, and laminae 
very much bent and contorted in its lower part. This has crumbled away, and left the 
upper mass overhanging. 
3. The lower mass is the red grit rock; and from its hardness, has resisted the action of the 
water more than the superincumbent shale, and it forms a terrace to the edge of the basin 
into which the water falls. 
45. From Roxbury to Aukville, at the junction of the Dry brook and the Bushkill with the 
Delaware, and thence over Pine hill and down the Esopus creek to Shokan and Canoe 
place, the same characters of rocks are observed, namely, two masses of grey and 
greenish grey grits and shales, covered by red and chocolate-colored and mottled grits 
and shales. 
46. From Walton to Colchester and Holmesville, the mouth of the Willewemock, Shahoc- 
ton, Deposite, Cannonsville and Walton, the same rocks were observed; the grey 
and greenish grey predominated, with some beds of bluish grit slate. This last is 
used for hones, and sets a fine edge. Localities about three miles from the mouth of 
the Willewemock, and others a mile or two below Cannonsville, have afforded some 
stones for this purpose. 
Numerous overhanging cliffs occur near Colchester, called rock-houses, caused by 
the disintegration of particular beds of the grey grits, leaving other parts of the same 
rock less susceptible of disintegration to form overhanging cliffs, arched grottoes and 
small caverns. Some may be seen near Dr. Bassett’s house. He had the kindness 
to show me some of them. 
