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Additional
tonalite
English Wikipedia - The Free Encyclopedia
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Tonalite
Tonalite
is an
igneous
,
plutonic
(
intrusive
)
rock
, of
felsic
composition, with
phaneritic
texture.
Feldspar
is present as
plagioclase
(typically
oligoclase
or
andesine
) with 10% or less alkali feldspar.
Quartz
is present as more than 20% of the rock.
Amphiboles
and
pyroxenes
are common accessory
minerals
.
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