622 
GEOLOGY OF THE FIRST DISTRICT. 
No. 
Strike. 
Dip. 
Kind of rook. 
LOCALITIES. 
SCHOHARIE COUN' 
TY. 
1 
Westward .... 
Nearly horizontal .... 
Slates, slaty grits, and grits 
of the Erie and Catskill 
divisions 
Strikersville falls and Gilboa. 
•2 
NW. 
SW very slightly .... 
Helderberg limestone, fos- 
siliferous 
One or two miles smith' of Middleburgh bridge. 
3 
do . 
SW at a very small 
angle of to 3® ... 
Helderberg limestone, and 
the rocks generally of 
Schoharie county in every 
part, viz. those of the 
Champlain, Ontario, Hel- 
derberg, Erie and Catskill 
divisions 
Every part of the county as a general rule, strike 
northwest to west, and dip southwest to south, 
nearly horizontal, but perceptible to the eye. 
4 
do . 
SW 1 foot in 15 to 1 
in 50, undulating 
Slaty grits of the Champlain 
division 
Between Esperan'ce and Burton’s bridge, five miles 
north of Esperance. 
5 
West . 
South about 1® to 1|®, 
nearly level to the eye 
Helderberg and Ontario di¬ 
visions 
Sharon springs. Vide PI. 25, fig. 3. 
6 
do ........ 
S very slightly, to 2° 
Erie, Helderberg and Onta¬ 
rio divisions 
From Sharon springs to Summit four-corners. 
do . 
do do 
Rocks of the Champlain, 
Ontario, Helderberg and 
Erie divisions 
From Spraker’s basin and Noses on the Mohawk, to 
Summit four-corners. Vide PI. 12, fig. 1. 
8 
do . 
South. 
Rocks of the same divisions 
and the Catskill division 
Prom Esperance to Prattsville, across Schoharie 
county. Vide PI. 25, fig. 6. 
It will be observed, by consulting the preceding tables of strike and dip of the rocks, and 
the directions of joints, that there are two main directions in which the strata have been broken 
and deranged, viz : north-northeast and south-southwest for one -system of elevation and 
fracture, and west-northwest and south-southeast for the other, though intermediate directions 
are not uncommon. These systems correspond in great circles, on an artificial globe, to 
others in other parts of the world ; but without farther and more detailed examinations, it 
would be premature to infer their identity in time. Another system of fractures and derange¬ 
ments runs a few degrees west of north, and another about northwest. 
The main transverse west-northwest upheaves are, 
1st. One across the Hudson at Sparta and Verdrietje hook. 
2d. One across the Hudson near Stony point, which is believed, from slight examinations 
made, to extend by Mount Eve to Carpenter’s point on the Delaware, and eastward by Mr. 
Cruger’s in Cortland, and across the Croton river into Connecticut. 
3d. One across the Hudson from Peekskill, and several miles eastward through the Horse¬ 
race, along the base of Anthony’s Nose mountain. Waggon’s islands. Fort Montgomery, near 
Queensbury forge, across the Clove near Monroe, the outlet of the Drowned-lands, Mount- 
Hope gap in the Shawangunk, Cuddebackville and the falls of the Mongaup. 
4th. Another across the Hudson at Constitution island, opposite West-Point, and the 
cascade half a mile west-northwest of the Cadet’s monument on the west, and by the soap¬ 
stone, serpentine, etc. beds in the east part of Phillipstown to the eastward. 
5th. Another three to four miles north of Newburgh, and on to the high points of the 
