Essex County herald. [volume] (Guildhall, Vt.) 1873-1964, 1879-05-02

There are two we'll marked areas of
these rocks. That on the east side of the
county begins on the south, probably
in CRANKY extends northwest through
Maidstone, well marked outcrops Of
which can be seen near Maidstone lake,
thence it continues through Brunswick,
and the Notch Mountains south of the
Nulhegan are composed Of this rock.
The western band begins With Miles
Pond, embraces Miles Mountain, where
the rock is Largely gneiss and contains
fibrolite. Extending Rorthward it is
interrupted by the graphic granite
south Of Island Pond in Brighton, to
appear again in Bluff Mountain, which
is its probable limit northward.
FIBRoLITE sCHIsT.
In the west of CRANKY, there is quite
an area of an argellitic mica schist that
contains an abundance of fibrolite and
andulusite, and there is repetition of
this rock in Victory, extending into
East Haven. 1t is also found in limited
amount on the east side of the county,
and with the feldspathic mica schists,
and gneisses.
THE LYMAN GROUP.
The rocks are so called from their great
abundance in the town of Lyman, N. II.
from whence they extend northward to
the line of the Provinces. These rocks
occupy large area in the towns of
Concord. Lupenburg and Guildhall;
extending also into Maidstone; where
they cross the river into New Hamp-
shire. They consist almost altogether
of light gray argillites and besides
there are few black states. The
Essex Copper mine in Concord is
formed in this rock. The vein of cop
per is very irregular, and though much
money has been spent; but little re-
turn has been made, and it is now
abandoned.
Several other small, veins in Con-
cord and Lunenburg have been parti-
ally examined, but none of them have
proved valuable.
CALCIFEROUS MICA SCHIST.
This rock occupies limited area in
the county and is confined to the west
ern part of East Haven and Brighton.
1t consists of argillites, silicions lime
stones and friable sandstones. Some
of the richest soil of Vermont.
GLACIAL DRIFT.
Everywhere we find that the materi-
al which makes up the soil, and the
boulders that are found so abundant
in some sections, have all been trans
ferred from points northward of where
they are now found; so that the soil is
often composed of an entirely different
material from the rock on which it rests.
The boulders in an open country can
be traced to the lodges from which
they were derived, but on account of
the forests in this county, this in most
lJltbCSS WOuiu IO1ulIO luuSu lliIlc dH(l
labor; still in every neighborhood are
many curious and wonderful things to
be seen by any one who will carefully
observe the rocks.
MODIFIED DRIFT.
On the Connecticut river, particular
ly in Lexington and Colebrook, are
many interesting gravel ridges that are
supposed to have been formed by gla-
cial rivers, as the ice retreated up the
valley. There is also very peculiar
ridge of coarse material in the vicinity
of Island Pond.
River terraces border the Connecticut
from the Province Line to the southern
border of this county. They consist OF
the present flood plane, ten or fifteen
feet above the ordinary stage of water,
and terrace from forty to one hun
dred and twenty feetin height. They
are something from one-fourth to one
third of mile in width.
ITO be COntinued)