Lead Mines, Se. of Hampshire County, Muss. 243 
% eae granite, six feet; 8, micaceous limestone, seven 
; 9, mica slate, eight feet. Ihave stated that this rock 
gentrally contains much mica and silex; such is the fact, al- 
though it sometimes has but little of these ingredients in it, 
and has been burned into excellent quick lime. 
Sometimes also, it appears to be the real granular lime- 
stone, or an approximation to it. [have seen some boulders that 
were, on one side, of the micaceous character, while on the 
other they were, decidedly, granular limestone. I have found 
several specimens of granular limestone in Williamsbargh, 
that had mica scales disseminated throughout them, an 
strongly partook of the micaceous character. This granular 
limestone, approaching the micaceous, or the micaceous ap- 
roximating to the granular, is found in blocks and bouldersin 
Williamsbeseh, Chesterfield and Cummington, though I 
have never seen it in place. 
Hornblende rock—verdigris. 
Under the hornblende is included hornblende as such, pri- 
mitive greenstone, and sienitic granite. But little norn- 
blende, rina ele sesh is found in this region; 
and what there appears blocks, or globular 
masses, F ‘ll sizes. Thic horablentle is generally amor- 
phous, but sometimes with a strong tendency to crystal- 
ization. It frequently forms beds and veins in mica slate, 
and sometimes alternates with it; ; and here I remark, that if 
part veins deserye attention, the hornblende veins do not 
merit 
The sical granite is i fret noticed in going a mile or . 
two west from Hatfield. up t the ter-_ 
tiary ‘formation, 50 or = feet” high, fe os towards on- 
necticut river. This abruption continues quite across H 
field, two or three miles into Northampton, and is known 3 
the inhabitants i in the vicinity, by the name of the Rocks. 
South in Northampton, as also west i in Hatfield, it appears on 
any little elevation, and is covered x a few feet of tertiary. 
The southern limits of this rock are at or near Shepard’s 
nen in Northampton, and its western near the 
ounds between Hatfield and. Williouishanah It passes 
oane into Whateley; here it is primitive greenstone, and 
this rock is composed of feldspar, hornblende and mica. 
mica scales are smal] and but few in proportion, and in fact. . 
the rock seems to be a real sienite, with only an intrusion of- 
= 
