i2 Geolocy, &c. of the Connecticut. 
saw a rock farther from stratification. Sometimes the fels- 
par js wholly wanting, and the rock appears to be mere 
unstratified mica slate, if such a term does not contain a con- 
tradiction. It is of no great extent, being evidently laid 
are by the waters of the Connecticut, which here urge their 
way in foaming fury over its ragged cliffs. The same rock 
oceurs two miles east of the falls; but, as far as I examin~ 
ed it, it seemed to occupy no great space: 7 . 
Stratification of Granite. 
Probably the granite of Ponsecrieis will leave ae ques- 
tion* on this subject undecided. For some of itis evident- 
ly stratified and some of it isnot. That which exists in 
not very extensive beds exhibits, sofar as I have examined — 
the subject, the most decided marks of stratification. Itis’ 
not dnftadtient to see the bed divided into layers parallel to 
its roof and floor, and from one foot to two feet thick. This 
is readily distinguished from gneiss by the much greater 
thickness of the layers and the want of a stratified : 
ment of the ingredients. Yn other instances, more rare, 
however,- we observe what Saussune would call vereieal 
_ (feuillets )—that is, thick tables of granite perpendi- 
to the horizon, crossing the bed sometimes at right an- 
pr ‘dee sometimes obliquely. These plates are also found 
making a dip tothe horizon—In all these cases, Seoaie 
the plates being parallel, or nearly so, the rock w 
properly denominated stratified. Examples of eae vari- 
ous kinds of arrangem@ht may be seen in Conway, Wil- 
liamsburg, Goshen, and Chesterfield. Yet the greater part ; 
of our granite is divided by numerous fissures into these ir- 
regular blocks that bid defiance to See description. 
Granitic Ver eins. 
By veins L enderitaiid: those zones of ony’ vapunioidih 
rocks, or mineral, which traverse another rock, either rec- 
tangularly or “obliquely to the direction ey its strata. Jn 
crossing the strata they differ from bods: 
* See Greenough’s First Principlarof iskeameane: Fs 
