CHAMPLAIN DIVISION. 
375 
Albany, Schenectady, Schoharie and Saratoga Counties. 
The strata of the Hudson-river group in these counties may be more conveniently described 
under two heads ; 
1. Those east of the anticlinal axis, which are upturned; 
2. Those west of the anticlinal axis, which are but little disturbed. 
1. The anticlinal axis above referred to ranges from near New-Baltimore, by Saratoga lake 
to Baker’s falls. The strata east of this line are upturned at high angles, and dip to the east- 
southeast. They may be seen well exposed in many places near Coeymans, and between 
that place and Albany on the bank of the Hudson, and in the beds of the streams, as Coeymans 
creek, Vlaman’s creek, Norman’s kill, and smaller streams ; also in the Patroon’s creek, and 
along the macadamized road between Albany and West-Troy ; at the junction of the Mohawk 
and Hudson rivers ; at the Cohoes falls, and various places to Visscher’s ferry. These strata 
are rarely exposed in Albany county, except in the banks and beds of the rivers and streams, 
being covered in most other places by the extensive quaternary deposit that occupies so much 
of the surface in the counties of Albany, Schenectady and Saratoga, and which has already 
been described (pp. 128, 140, 148 of this volume). 
At Cohoes falls, the strata are upturned at a high angle, and much contorted. Fossils are 
common in some of the strata of slate, but they belong to the Utica slate, the next group to 
be described. 
At the lower aqueduct across the Mohawk at Halfmoon, the rocks are upturned at a high 
angle, and are exposed in the bed of the river. 
Near Cohoesville, the strata are much contorted. A section near the canal, one mile and 
a half northwest of that village, is represented on Plate 11, fig. 1. These strata are mostly 
the grits (Frankfort slates). 
Section half a mile west of Half moon landing. 
1 
Slate. 
Feet. 
2 
Slaty grit. 
4 
3 
Slate . 
li 
4 
Compact grit. 
4 
5 
Slate . 
6 
Compact grit... 
10 
7 
Slate . 
6 
8 
Grit. 
2 
9 
Slate . 
14 
10 
Grit... 
10 
11 
Slates . 
100 
12 
Grit, light grey. 
6 
13 
Slaty grit. 
50 
14 
Grit, compact... 
4 
Worked as a quarry stone. 
15 
Slate . 
3 
16 
Grit, compact. 
4 
Worked as a quarry stone. 
205 
