538 
GEOLOGY OF THE FIRST DISTRICT. 
Mearn’s quarry is half a mile below the falls. 
Two other quarries are within one mile below the falls. 
Faurot’s quarries are half a mile and one mile below Consook island. Capt. F. sold twelve 
hundred tons of stone in New-York in 1838, at one dollar and seventy-five cents per ton. 
Another may be opened near Fort Montgomery. 
Many other quarries might be opened along the shore at intermediate points, where the 
stone is of good quality ; but much care is necessary in selecting judiciously, since a large 
portion of the mass of gneiss rock is not of a good quality. Little of the rock from Faurot’s 
quarries to Mearn’^s quarry is good. 
Several fine gneiss quarries might be opened on Wagon’s islands, and between these and 
Caldwell’s landing. 
4. Mica Slate. 
This rock has been described by Prof. Eaton, near Fort Montgomery. It is the rock which, 
in this report, has been called micaceous gneiss ; and like that which has been described on 
the eastern side of the Hudson, associated with the white limestone, it is pyritous, and usually, 
where e.xposed to the weather, has a reddish iron-stained color. It has beeu. observed in 
several places to contain scales of sulphuret of molybdenum. This has been observed about 
one mile northwest of Fort Montgomery, two miles northwest of the same place, and at the 
foot of the Crow’s Nest in loose masses. The two former localities showed the rocks in 
place. 
5. Augite Rock. 
This rock occurs in very many places in Orange and Rockland counties. It is almost 
uniformly associated with scapolite and limestone. The augite generally contains sphene and 
plumbago; and the masses associated with limestone, or where the two rocks come in con¬ 
tact, often exhibit beautiful and terminated crystals. Mica in crystals, often of large size, is 
frequently associated with augite. 
The finest large crystallized augite has been obtained, 
1. At the locality near Greenwood furnace, Monroe, Orange county. 
2. At the mica locality near the Forshee mines in Monroe. 
3. At the Two ponds in Monroe. 
4. Near the Forest of Dean mine.. 
Other localities where beds of this rock of small extent are exposed, may be seen, 
1. Near the crossing of a small stream by the road-sid,e about two miles from West-Point, 
on the road to Round pond. It is in place by the road-side, though possibly now covered over, 
and some large blocks are on the surface. It is associated with white scapolite, which has 
in some specimens a slight rose tinge, and which is in large opake crystals, and acicular 
