Geology and Mineralogy of a part of Massachusetts, &c. 13 
so much in its composition as well as situation from the 
others included under the same name, that a specific name 
seems important. It occurs at a lower level, and is associ- 
ated with the mica-slate of the Taconick range. It is found 
on the west side of Saddle Mountain, in Lanesborough, 
near the meeting-house in Lenox, on the northern part of 
Great Barrington, and at the east foot of Taconick Moun- 
tain: also along the hills west of Williamstown. Itis nota 
very extensive rock, and must be considered as merely an 
associate of the principal rock, mica-slate. 
The preceding rocks, mentioned under mica-slate, seem 
to me to occur in beds, and none of them to form distinct 
strata. This view of these associated rocks is consistent 
with fact, and assimilates our geology more to the Euro- 
pean. 
4, GRANULAR LIMESTONE. 
Colored yellow. 
Although this mineral is not considered by the generality 
of geologists, as one of the continuous rocks or strata, but 
as forming only beds in the primitive strata, yet the extent 
of it. in this section renders it proper to treat of it in this 
connexion. Coarsely granular limestone is found occa- 
sionally in small beds or in’ large masses in most of the 
towns along the eastern part of this section. It occurs 
thus in Becket, Middlefield, and Savoy. There are, how- . 
ever, two nearly parallel ranges of granular limestone, ex- 
tending through Berkshire county. The eastern range 
may be traced from Stamford, through Adams, Windsor, 
Washington, New Marlborough, into Canaan, Con., and 
thence southwards to Washington, in Con. The western 
range lies through Bennington, Vt., Williamstown, Lanes- 
borough, West Stockbridge, and Salisbury, Con. Both 
ranges run nearly parallel with the western boundary of 
Massachusetts, and extend far north and south into the 
states of Vermont and Connecticut. ‘The limestone is de- 
cidedly granular. In the eastern it is more coarsely granu- 
lar and more highly crystalline. This difference is very 
obvious in the limestone of Adams, and that in Williams- 
. 
