Geology, &c. of the Connecticut. 15 
will probably visit. I refer to the main body of that enor- 
mous, vein containing the green tourmalin, rubelite, &c. 
in Chesterfield. We think it aight even admit of a ques- 
tion whether this bea bed or a vein. 
he. veins of which we are now epahleing are doubtless 
conte eous ones—that is, such as were consolidated 
at the same time with the rocks they traverse. ‘There is no 
seam or layer of another rock at their sides, but they are 
vs so firmly united to the rock which contains them, 
are separated from these with as much difficulty 
as ‘oo are broken in any other direction. I have, how- 
ever, frequently noticed a seam traversing the middle of the 
vein—so that if the rock they traverse be broken up, one 
will cleave toone side and one half to the other. 
_ A real dusus naturae exhibiting the fine cohesion of these 
veins to the rocks th ,now lies before me. A slab 
of granite being a vein 24 - o eatroners inches broad, and 
20° eet es long, curved a little san Arte at — end, forms 
the base of the» 
perpendicularly a bladed, eapervpclated column of a 
liar limestone, only 2 inches thick, 10 inches broad at shi 
base, and 26 —_ high, appearing as if mortised into the 
ranite. ‘The contrast between the light coloured granite 
and the dark aad limestone, is very striking. The secret 
of its having been brought into this singular form appears 
to be this. It was found in a mountain torrent in Conway, 
and. once formed a vein in the lime- 
stone. On one side the limestone has been. entirely worn 
away a the water—and = the other side, it is worn so as 
to.leave only the bladed column above described, which 
still adheres firmly to the granite. 
have said that these granitic veins are contemporane- 
ous ones: And it would seem that the judgment of no man 
could be so warped by theory, as to believe, after examin- 
ing them, that they were once fissures made in the rocks — 
they teavereey _ these were consolidated, ie that these 
fi wer ed by a solution of water above, or by a 
fiery f situa ane There is just as much reason for 
believing that one of the constituents of granite, quartz for 
Papier was introduced. ‘into the rock 1 in this manner after 
the ot or that the imbed- 
nae 
