No. 275.] 
121 
tends from Verdrietje Hook, below Haverstraw^ to Stony Point* ano- 
ther lines the shore from Dunderberg Point, above Caldwell's Landing, 
to one and a half miles below; others of the pebbly and gravelly varie- 
ties, at an elevation from 100 to 200 feet above the river, overlaying 
the gneiss and granitic rock, extend at short intervals from Fort Mont- 
gomery to two miles above West-Point. A clay deposit lies in the val- 
ley, and near the shore between the Crow's Nest and Butter Hill moun* 
tains; and another extends from one mile west of Butter Hill Point, by 
Cornwall and New- Windsor, to Newburgh. 
The tertiary deposits extend up the valleys of the streams, and are 
spread more or less extensively over the interior. They attain an ele- 
vation of 300 to 500 feet above the Hudson. Those on the banks of 
the Hudson are nearly uniform in height, and their surface is from 150 
to 200 feet above tide water. Pottery of a coarse kind is made in Can- 
terbury, and perhaps in some other towns in Orange county, but the 
principal econorainical use of the clay beds of the tertiary deposits of 
Orange and Rockland counties, is for the manufacture of bricks* In 
Rockland county, bricks are made as follows: 
At Hodge's yard, at Grassy Point, they made in 1838,. . . 2,500,000 
Wm Holmes' do do ... 2,000,000 
Mumer's, do do ... 3,500,000 
Mackay's, at Haverstraw, do ... 2,500,000 
Churchill's, below Caldwell's Landing, do ... 1,000,000 
Lent's, do do ... 500,000 
12,000,000 
In Orange county, bricks are made as follows: 
At F. Clark's yard, in Cornwall, in 1838, 1,260,000 
Cronkites, do do say 1,500,000 
W. Stringham's, do do 1,000,000 
N. Audam's, do do 3,000,000 
M. L. Sproat's, Walkill, do 300,000 
S. C. Wood's, Goshen, do 300,000 
Norris', Newburgh, do 2,100,000 
Anderson's, do do 300,000 
Total bricks made in Orange county in 1838, .... 9,760,000 
f Asscm. No. 275. J 
16 
