404 
GEOLOGY OF THE FIRST DISTRICT. 
This range of limestone is frequently accompanied by the “ Calciferous sandrock,” and 
sometimes by the Potsdam-sandstone of Prof. Emmons. These rocks, however, were not 
observed at Bald mountain, or on the continuation south of Galesville. 
A similar range of limestone was seen on the east bank of Pawlet river, near the northwest 
corner of Granville. Another in Salem, three miles south of the court-house. Another on 
the west side of that branch of the Owl kill that flows from the lakes in Jackson; this ranges 
north and south by Cambridge, two or three miles in length. Another about one and a half or 
two miles east of Wait’s corners in Whitecreek, and here the calciferous sandrock is also, 
present. • These two rocks are associated near Cambridge centre, and four miles northwest 
of Cambridge, in Jackson, in several localities ; also at Battenville, and thence range north 
by North-Greenwich and Summit lake to two miles northeast of Argyle corners. They occur 
also at Centre falls. These are isolated upturned masses, the connections of which have 
not been traced out. 
Another range extends from near the northwest corner of Hoosick in Rensselaer county, up. 
the valley of the Hoosick by Hoosick falls and Hoosick corners ; thence up the valley of the 
Little Hoosick, through Petersburgh and Berlin to the Lebanon valley. 
Local patches of this rock occur in various other places where the rocks have been very 
much broken up, as on Little White creek, near its mouth; on the Wallamsack, near its 
junction with the Hoosick river,* one mile, and two miles southeast of Hoosick corners. 
The rocks in the region of country in which these various patches and detached ranges of 
imestone have been seen, have been broken up and upturned, so as to present an appearance 
similar to that produced by ice fields crushing against each other, and then freezing, so that 
the fragments stand edgewise at a greater or less angle of inclination. The dip and strike 
of these masses are variable, but in the aggregate conform to the adjoining rocks of the coun¬ 
try, viz. to the east-southeast, north-northeast and south-southwest. 
Another mass of the Mohaw'k limestone follows the range of the Trenton limestone, as far 
as I have described it in Schenectady and Saratoga counties; and in Washington county, it 
ranges along the base of the mountains in the valley of the west branch of Wood creek to 
Fort-Ann, where it joins the mass that ranges from Lake Champlain to Bald mountain (Vide 
the Map of the State). 
Mount Lookout, in Orange county, a few miles from Goshen, near the county poor-house, 
is composed entirely of limestone of a dark color, generally of a fine grain and compact, and 
is supposed belong to the Mohawk or Black-river limestone. 
“ Its southern, western and northwestern boundary is a circular wall of limestone, about 
perpendicular, and at a distance having quite the appearance of trap rock. It lies in a posi¬ 
tion nearly horizontal, having but a very slight inclination to the west. In this neighborhood 
the limerock abounds in hornstone, generally black. When the western branch of this lime¬ 
stone reaches Great island in the Drowned lands, its dip is to the northwest, and so continues 
The dip is here to the southwestj and the strike to the northwest. 
