-
crystals in an
aphanitic rock are too fine-grained to be identifiable.
Phaneritic texture forms when
magma deep
underground in the
plutonic environment...
- are
phaneritic, aphanitic, porphyritic, gl****y, pyroclastic, and pegmatitic.
Aphanitic (a = not,
phaner = visible) rocks, in
contrast to
phaneritic rocks...
- insulator, so the
magma cools slowly, and
intrusive rocks are co****-grained (
phaneritic). The
mineral grains in such
rocks can
generally be
identified with the...
-
known of
highly sheared granites which can be
mistaken for rhyolites. For
phaneritic felsic rocks, the QAPF
diagram should be used, and a name
given according...
-
magma is
extremely slow, and
intrusive igneous rock is co****-grained (
phaneritic). However, the rate of
cooling is
greatest for
intrusions at relatively...
-
Granodiorite (/ˌɡrænoʊˈdaɪəraɪt, ˌɡrænə-/) is a co****-grained (
phaneritic)
intrusive igneous rock
similar to granite, but
containing more plagioclase...
- in the
mineral pot****ium
feldspar (K-spar). It is a
dense rock with a
phaneritic texture. The
abundance of K-spar
gives the rock a
predominant pink to...
-
Gabbro (/ˈɡæb.roʊ/) is a
phaneritic (co****-grained),
mafic intrusive igneous rock
formed from the slow
cooling of magnesium-rich and iron-rich
magma into...
-
Foidolite (/ˈfɔɪdəlaɪt/) is a rare
phaneritic (co****-grained)
intrusive igneous rock in
which more than 60% (by volume) of light-coloured
minerals are...
- is an igneous,
plutonic (intrusive) rock, of
felsic composition, with
phaneritic (co****-grained) texture.
Feldspar is
present as
plagioclase (typically...
