544 
GEOLOGY OF THE FIRST DISTRICT. 
the left bank of the Hudson. The distances were estimated by the eye, not measured, and 
of course are not accurate, and along the base of the mountain are much underrated. The 
rocks are illustrated in position as far as Roya hook, on PI. 14, fig. 4. 
No. of Remarks on the direction fiom place to place, with the strike, dip, and nature of the rocks, etc. Distances 
1 From Peekskill upper dock, N. 50° W. to point.....300 
Granitic gneiss, grey. Fine building stone. 
2 N. 40° W. Dip N. 50° E. about 50°... 150 
3 N. 20° E. Same rock.... 50 
Granular quartz finely stratified. Dip S. 60° E. about 60°. This rock would make 
a fine flagging stone. 
4 N. 40° W. across the mouth of Peekskill creek....300 
5 S. 80° W. to Roya hook.....800 
Quaternary formation along the shore a part of the way, and salt marsh northeast of 
the hook. 
6 N. 70° W. to Gen. Van Cortlandt’s gneiss quarry;-250 
7 and thence on the same course to quarry point_200 
8 N. 45° W. to the cove-200 
The ground is but little elevated, but contains fine granite, some of which has been 
quarried. Island south one hundred yards off shore. 
9 S. 60° W. to a point on which hornblendic gneiss prevails___ 150 
The strata are nearly vertical, and a marsh is on each side of the point in the re-enter¬ 
ings of the shore. 
10 N. 40° W. to the Second granite point_ 150 
A pine tree stands conspicuous on the point. 
11 North to a small marsh_ 150 
Granite and gneiss forms the shore to the marsh, and quarries might be opened here. 
12 N. 30° W. to the west end of the marsh_ 120 
13 N. 70° W. to the Third granite and gneiss point_ 50 
14 N. 40°W_______200 
Gneiss, hornblendic gneiss, and compact felspathic gneiss. Strata vertical. 
15 N. 15°W____300 
Granite, gneiss, and hornblendic gneiss. Dip vertical and variable. Range or strike 
in some places N.N.E., and others N.N.W., and dip 30° E.N.E. 
16 N. 40° W. in a direction towards Mrs. Pell’s house, from the foot of the wood-slide_500 
Granite and hornblendic gneiss. 
17 N. 25° W. to point east of Anthony’s Nose point_400 
This point is in the line that, if prolonged, would strike Fort Montgomery lower 
landing. 
18 N. 20° W. to Anthony’s Nose point_300 
Line prolonged would strike Fort Montgomery hill; and Mrs. Pell’s house bears N. 
70° W. about half a mile. Rock compact, and may perhaps be called eurite at 
the point, 
