[Assembly 
Cords. 
Brought forward, 
Another east of Stewart's iron mine at the base of the hill, 20,000 
Another half a mile south of do. in Phillipston, 10,000 
Another near Davenport's corners, five miles northeast of 
Cold-Springs, 100,000 
Another half a mile west of Saxon Smith's, in the SSE 
part of Phillipston, 25,000 
1,161,000 
Marl, 
This alluvion, although sought with care, was not found in New- 
York, Westchester or Putnam counties. It seems to be confined to 
the slate and graywacke regions of the First Geological District, as far 
as we can judge from the observations made thus far on the Geological 
Survey. 
Terrains de Transport. , 
This, as a descriptive term, is meant to include all those materials 
which, as a mantle, cover the proper rock formations over a considera- 
ble area in the counties under consideration. 
They bear undoubted evidences of having been transported by, and 
deposited from water. They are found as gravel and pebble beds, 
boulders and erratic blocks, and as sand and clay beds, in the main 
valleys of the streams. They are all of high scientific interest; but in 
the present report only those of economical value will be discussed. 
Clays and Sands. 
These materials form numerous and extensive beds along the banks 
of the Hudson, varying in elevation from the level of the river to a 
height of near 100 feet. The general order of superposition where all 
the beds occur, is as follows: 
1. Gravel and pebble beds of variable thickness. 
2. Sands stratified with water lines oblique to the strata. 
3. Gray or yellowish clay. 
4. Blue clay. 
The blue clay generally rests on the subjacent rock, or on beds of 
gravel. The sand is extensively used for brick making, for lime-mortar, 
for casting sand and for moulding sand, and in brick making. Mate- 
rials suitable for this purpose are found in many places, but the brick 
