SERPENTINE. 
89 
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support the view that surpentine is truly an 
eruptive rock, and belongs to the same class 
as granite and sienite. This view is also 
sustained by its distribution and mode of its 
occurrence, the latter of which has been spoken 
of. Its distribution is more or less in belts 
or lines, whose directions are well indicated 
when we compare the position and relations 
of the masses at distant points. This will 
appear on comparison of the distribution of 
the rock along the Green Mountain range. - 
Beginning at the extreme northern boundary 
of Vermont, in the township of Troy, and fol- ‘ 
lowing its range south, we shall find its 
masses distributed along a north and south s o, 
line. From Troy it extends into Canada 
East, but southerly it is met with at Lowell, 
Newfane, Vt., Windsor, Middlefield, Chester, 
Blandford, Mass., and finally on nearly the 
same range as the Milford and New Haven 
quarries in Connecticut. The serpentine of 
this belt is alike. Thfit of Milford and New 
Haven is more calcareous, and its colors are 
lighter and more blended with yellows than at 
the northern localities. The belt is also 
chromiferous, and more or less ferriferous. If 
the Green mountains should be regarded as 
a part of the Highlands, and as a prolonga¬ 
tion of the Alleganies, we shall find the serpentine arranged 
in a northeast and southwest line, forming a belt of this rock 
along the whole eastern slope of this range of mountains, as 
far south as Georgia. It is coextensive with the Blue ridge, 
and is chromiferous through its entire extent. 
I have already spoken of the fields of serpentine associated 
with the pyrocrystalline limestone of Warren, Essex, Jefferson, 
St. Lawrence and Orange counties, N. Y.; to which may be 
added that of the district of Johnstown in Canada West These 
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