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74_ppl
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Object Description
Rating
Thin Section ID
74
Quantity
1
Handsample ID(s)
yes
Rock Class
metamorphic
Rock Name
serpentinite
Mineral Assemblage
serpentine
talc
calcite
Microscopic Description
Composed
mainly
of a
variably
textured
aggregate
of
antigorite
and
talc
.
Some
parts
are
mainly
fine
interlaces
of
serpentine
;
others
consist
of
both
serpentine
and
talc
completely
intertwined
and
still
other
parts
are
mainly
talcose
.
Veinlets
and
bands
of these
minerals
,
together
with
some
carbonate
are
widespread
. There
is
also
considerable
carbonate
which
appears
in
two
types
of
two
distinct
ages
1)
corroded
patches
of an
older
turbid
carbonate
and
2)
veinlets
of a
younger
,
clear
magnesite
.
Streaks
and
patches
of
fine-grained
magnetite
are
common
throughout
.
Geographic Sample Location
Rochester
,
Windsor
County
,
VT
,
USA
Petrologic Suite Name
Ward's
Collection
of
Classic
North
American
Rocks
Collection Company
Ward's
Literature Citation
Jahns, R.H. Serpentinites of the Roxbury District, Vermont. pp. 137-160. Ultramafic and related rocks. John Wiley and Sons, Inc. 1967.
Course ID and Name
GY 202 Intro. to Petrology
Instructor Name
Noblett
Assignment Name
Island
Arc
Project
Storage Location
TSC 107, A, n, black box, 'Sedimentary Island Arc Project'
Oriented
no
Description
Thin Section ID
74_ppl
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