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Great Synclinal in the Taconic Range. O71 
ally between 30 and 60 degrees. On the east side, it is west- 
ward ; in a large portion, only 10 to 25 degrees or not diverging 
widely from the horizontal, but in other parts ranging up to 
Hee and dip are indicated by T-shaped symbols ; the aN 
the stem of the T is inversely as the amount ‘of di 
the point of junction of the top and stem marks the leat yy ‘of 
the observation.) In an east-and-west section through the 
Massachusetts,) the ae on the west side in Copake i is 40 to 50 
degrees eastward; at Mt. Everett, which is near the eastern 
> 
border, 35 to 60 Raine westward ; and at the base directly 
Figure 1 is a abot of the beds at the western foot, and 
fig. 2a a tiork at the eastern. 
y observations on the dip at other points in Massachusetts 
sustain the conclusion as to the synclinal character of the 
mountain-mass.* The synclinal is really a compound synclinal, 
that is, contains within it subordinate anticlinals and synclinals. 
This is suggested by the two Hagen valleys running deeply 
into the mountain area on the north, and by the occurrence, 
Within the area, near its southera pr of small limestone 
belts, as already ‘pointed ou 
. The eneral synclinal ore of the mountain is indicated 
it on either side and to the south. Here a quarry was opened 
for the sake of the limestone, and consequently the cover of 
* The following are some observed strikes and dips at the eastern base : 
In Massachusetts, near the northern end, schist N. 35° W., 10°-15° W., and 
limestone, 407 off, N. "55° me “ 
limestone N. 10° W., 15°-20° W.;.2 m. farther south, schist, about 25° W.; 4m. 
N. of the line of the State, schist N. 20° E., 50°-55° W., oer 75’ off same. 
In Connecticut, just south of line, at Sage’ 8 ravine, schist N. 20° E., 50°-65° W., 
limestone +m. oo. N. 22° E., 60° a W., but varying much, The dip of the 
Schist increas uthward, a and a mile south is 90°, and two miles south has 
some caktiog | the Neumann just pa of it generally dips westward. (See map.) 
