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Geology, Sc. of the Connecticut. 5 
quantity and the granite See In pone | ~ is 
pe the South Hampton granite, | have compre- 
ed most of the Chesterfield and Goshen granite,* * which 
bes become celebrated on account of the interesting minerals 
found in it—although the mica slate in those towns occupies 
probably as much of the surface as the granite. ‘The pur- 
Je colour, or that which represents the granite, has not been 
extended so far as to embrace all the beds of this rock in 
this region; but only so far as the granite predominates. 
Where the mica slate is most abundant, I have put down 
this rock as covering the whole surface, although %e iielit 
contain many beds of granite. 
he inclination of the mica slate strata, or dip below the 
horizon, and consequently of the granite beds, varies from 
| 20° to 90°: and thus frequent opportunities are afforded for 
observing the former rock pass under and over the latter. 
The width of the beds varies from the fraction of an inch 
100 r thn s fete sanile or, two. So° ner in 
of will p 
rrow b 
voor and floor. "Tn these thin beds there is rarely ie fis- 
sure; but in those several hundred yards in width, are fre- 
quently observed regular and oa divisises as will be 
more particularly noticed hereafter 
hese distinctly characterized granite beds are not con- 
fined to the region of the South Hampton granite. A few 
miles north, indeed, they disappear; but they may be 
traced delbsiily into Litchfield county, where they exist 
abun¢ eri and are sometimes found in me slate, 
ant ss. A example of the former may be seen in 
Granville, about half way between the churches in the east 
and west parishes where the layers of hornblende slate are 
nearly perpendicular. Instances of their existing in gneiss 
ance 
we think the geologist who traverses s New-England primi- 
tive rocks will often be ledto enquire, whether all our gran- 
* cw , a td éh 1 +535. ra} Pe aN - Lea 
saying that more distinct and well marked beds do not Pe in pate hi pa 
of the United States or Europe; and what renders t 
— is, the distinctly stratified structure of some of them. Nan Amer. di Rev. 
No, 29——p. 233. 
