244 Lead Mines, &c. of Hampshire County, Mass. 
a little mica; the hornblende is of its usual ¢ spnceranets a: 
the feldspar is often of a beautiful flesh c e. 
ledges and even hand specimens are, on one pos of this 
flesh colour, while on the other, the feldspar is of its common 
whitish aspect, and this too without any approximation of 
the colours one to the other; the flesh colour will retain its 
character perfectly until it reaches its limit, and then com- 
mences the white, equally perfect, without the least seam or 
sure between them. Sometimes a vein of white feldspar 
will i interpose itself between the colours; the feldspar veins 
are of all lengths and breadths; often they are pushed seve- 
ral inches out of their course, Maia form shoulders ; some- 
times they diverge one from the other, and then again they 
intersect one another, as in the profile. 
i 
= 
Here, I represents the diverging veins, and 2 the disturb- 
teckes up, Siney" present a vast quantity of salle oerane 
These parallelograms | are of all sizes, fr én a few cubic 
siddién dfaripiien of the rock. Primitive greenstone code 
a large share of this rock, and is frequently isolated. in 
enitic: — 3; sometimes only an inch or two is thus 
son several cubic yards, The greensiony 
) Paliie ® with the sienite, and is firmly attached to it. ft 
breaks 
have also seen real hornblende thus associated with sienite, 
sa inclined to crystalization, and often composing 
f a 
_ one half of a block, while the other half was indubitable 
all the greenstone is in ‘Whately, where it is only 
fe of the same rock, which constitutes the sieni-. 
. Eran ¢ Hail. The Sie runs about to t the line. 
