404 J. D. Dana—Taconie Rocks and Stratigraphy. 
Sections 37-39 in Tyringham. Section 37 is on a line ex- 
tending nearly westward from Tyringham village to the summit 
of “Cobble Hill” which stands in the valley near the village. 
Fig. 39 isa view up the valley, looking southward, showing 
the hill (at c) in the valley. The limestone dips beneath 
mica schist and gneiss, and the latter is the predominant rock. 
: “>, 
LS 
Eee. =. 
SS 
as 
37. “Cobble Hill, Tyringham. 38. W, of Cobble Hill, Tyringham. 
The limestone and schist of Cobble Hill extend westward, and 
are the rocks at a high level (800 feet or so) on the west side of 
the valley just south of an old Shaker establishment; and they 
extend from that place northward at about the same level all 
the way to South Lee, keeping nearly the same high level. At 
a point a few rods south of the Shaker establishment (now a 
summer boarding house) the limestone and schist outcrop on 
the road side, as in section 88, the former disappearing wnder- 
neath the latter; but whether normally underlying or not is a 
undecided question. 
3 Tyrinoham 40. Southern part of\Lee, 
On the east side of the Tyringham valley the limestone over- 
lies quartzyte or gneiss, and is not found anywhere much above 
the level of the valley plain. 
Section 40. At the foot’of the east slope of Tyringham val- 
ley, ia South Lee, where bedded quartzyte dips westward at a 
small angle, crossing the road; but at one place, just south of 
. this crossing, in the field, the limestone is seen overlying the 
quartzyte with similar westward dip and nearly the same 
angle. 
43, S. Mountain, Pittsfield. 
Section 41. On the western border of the town of Washington, 
west of the Hearthstone quarry, and south of the road from 
Dewey’s Station.* A large outcrop of arenaceous mica schist 
* On the map, fig. 41, the location of the section is wrongly stated to be west 
of Dewey’s Station, instead of east. 
