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Argillaceous minerals
Argillaceous minerals
may appear silvery upon optical reflection and are
minerals
containing substantial amounts of
clay
-like components ( = clay). Argillaceous components are fine-grained (less than 2
µm
)
aluminosilicates
, and more particularly
clay minerals
such as
kaolinite
,
montmorillonite
-
smectite
,
illite
, and
chlorite
.
Claystone
and
shales
are thus predominantly argillaceous.
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