No. 275.J 
127 
It was seen on the road side west of Stony Point along the ravine 
of Minischecongo creek, above Captain De Camp's, three or four miles 
southwest of ladenton, and about half a mile west of Mechanicsville. 
It thus seems to skirt the northwest boundary of the sandstone forma- 
tion in Rockland county, where it approaches the granitic and other 
rocks of the Highlands. A large block of this conglomerate is deposited 
in the geological rooms of the State collection in the capitol. 
The fossiliferous limestones of Orange county at Mount Lookout, Tri- 
otite Mount, and Townsend's ore bed, with the conglomerates ^ grits and 
5Aa/e5 of Shawangunk and Bellevale mountains will be found described in 
Dr. Horton's description of Orange county, in the appendix to this 
report. 
Granite. 
This rock abounds in Rockland and Orange counties. It occurs in 
beds and veins, and in masses that are divided into layers several feet 
ttiick, and that might be called granitic gneiss, or thick bedded granite. 
In the present report, the localities of economical interest as suitable 
locations for quarries^will be mentioned. Numerous locations for this 
purpose are known at distances greater or less from the Hudson, and 
will be mentioned in the final report, together with many localities of 
this rock of scientific interest. 
In the present report, those of economical value on or near the banks 
of the Hudson, and convenient to water transport, will be mentioned. 
Many facts connected with the granite of Orange county, will be found 
in the descriptive geology of Orange county, by Dr. Horton, in the 
appendix to this report. 
Local Details. 
Granite and granitic gneiss, suitable for quarrying, occur at the foot 
of Butter Hill and of the Crow's Nest. 
A granite quarry might be opened with advantage on the shore, about 
one mile south of Fort Montgomery, and east of Mrs. Pell's house. 
Several quarries can be opened on Waggon's islands, between Fort 
Montgomery and Caldwell's Landing. 
. One or more quarries can be opened at the foot of the Dunderb^g 
mountain, between Caldwell's Landing and Waggon's islands. 
