mp AND STRIKE OF STRATA. 
615 
No. 
Strike. 
Dip. 
Kind of rock. 
LOCALITIES. 
1 
N10° to 20° E. 
Eastward at high an- 
RENSSELAER COUIS 
All the rocks of the county 
ITY. 
Over the county generally ; some few local exceptions > 
2 
gles from 40° to 90°; 
slates often contort¬ 
ed 
Both east and west, an- 
Grits and slates of the Hud- 
a few examples only subjoined. 
About one and a half mile east of Greenbush, on the 
grees east 
ticlinal from 38° to 
son river group 
road to Sandlake. 
3 
Eastward 50° to 80°'.. 
Slates of the Hudson-river 
About two and a half or three miles east of Green- 
4 
^ group ^ ^ ^ 
bush. 
About four or five milfes east of Greenbush. 
Hudson-river group 
Between Sandlake and- the Tuckawassick kill. 
6 
coarse green grits 
Near the northeast'corner of Nassau. 
7 
ritic slate 
Near the west part of Stephentown. 
Near the east part of Stephentown. 
On the macadamized road from Troy to Bennington, 
8 
nml limActAno libp 
9 
do.... 
do 50° to 90° ......, 
those of Lebanon springs 
Slate and slaty limestones 
10 
do 50° . 
of the Hudson-river group 
two to four miles from Troy. 
On the macadamized road from Troy to Petersburgh, 
about six miles from Troy. 
On the same road, about eight miles. 
On the same road, about ten miles. 
11 
/1a . 
do .. 
Coarse greenish apits 
12 
Ha . - .. 
do 50® to 90®. 
Rod slaf.ft... 
13 
Ha 
do . 
On the same road, about eleven miles. 
On the same road’, about twelve miles, between the 
small lakes in the north part of the town of Graf¬ 
ton. 
On the same road, about thirteen miles, and so on to 
the top of Petersburgh mountain. 
On the east descent of Petersburgh mountain. 
14 
Ha 
Hn ... 
RaH ° 
15 
16 
do .. 
do ____ 
17 
18 
_ 
do . 
do- .. 
do 30° to 50°. 
do 50°'to 80°’..... 
Sparry and blue limestone . 
Metamorphic limestone ... 
Slate, chloritic and talcose. 
Limestone, contorted' and 
Along the valley at.the base of Petersburgh moun¬ 
tain. 
At the corner of Massachusetts, Vermont and New- 
York. 
Farther towards Hoosickfrom Williamstown, in Ver¬ 
mont. 
Stijl farther towards Hoosick from Williamstown. 
19 
do . 
do do . 
20 
do variablfe. 
do do . 
21 
do ... 
do do . 
metamorphic 
Talcose and chloritic slates 
Near where the above road enters the northeast cor¬ 
22 
do • • • • • • • 
do do 
and quartz 
ner of Petersburgh, in Vermont. 
North part of Petersburgh. 
About two miles from Hoosick four corners on the 
road to Williamstown. 
About one mile from the above, towards Hoosick. 
Warren’s and various quarries between Hoosick four 
corners and the Wallamsack river. 
On the road from Hbosick falls to Cambridge, 
near the junction of the Hoosick and Wallam¬ 
sack. 
Wickmin’s quarry, in the town of Lansingbuso-h. 
23 
NW. 
NE. 
Limestone, sparry and blue 
24 
nne . 
ESE 30°. 
25 
Ho __ 
do 30° to 40°. 
P fa 
26 
NWand SE .. 
SW . 
_ 
27 
NNE .. 
Vertical and' variable . 
Slates and grits. 
28 
1 
do . 
ESF, 30° to 40°. 
^rit" 
PI. 3, fig. 3. 
Gluarries near Troy, on. the hill. 
NTY. 
Whitehall. 
NNE . 
ESE 10°.. 
WASHINGTON COU 
IGneiss, Potsdam sandstone, 
2 
3 
do . 
NNE . 
do ...^J 
ESE 10®. 
Gneiss, Potsdam sandstone, 
1 etc. 
Three or four miles from Whitehall, on the road to 
Fort-Ann. 
Eight or nine miles from Whitehall, on the road to 
Fort-Ann. 
