- used.
Geologists describe four
qualitative levels of crystallinity:
holocrystalline rocks are
completely crystalline;
hypocrystalline rocks are partially...
-
Nepheline syenite is a
holocrystalline plutonic rock that
consists largely of
nepheline and
alkali feldspar. The
rocks are
mostly pale colored, grey or...
-
feldspar – a
plutonic rock with <5%
normative quartz Nepheline syenite –
Holocrystalline plutonic rock – A silica-undersaturated
plutonic rock of nepheline...
- also
called dolerite (/ˈdɒl.əˌraɪt/) or microgabbro, is a mafic,
holocrystalline,
subvolcanic rock
equivalent to
volcanic basalt or
plutonic gabbro...
-
mafic intrusive igneous rock
formed from the slow
cooling magma into a
holocrystalline m**** deep
beneath the Earth's surface. Slow-cooling, co****-grained...
-
monzogabbro (/ˈnɛfəˌlɪn ˌmɒnzoʊˈɡæbroʊ, -ˌliːn-/), is a dark gray or
black holocrystalline plutonic igneous rock. Its name is
derived from the type
locality in...
- tremolite-talc
schist is not
generally considered a
variety of amphibolite. A
holocrystalline plutonic igneous rock
composed primarily of
hornblende amphibole is...
-
Alkali feldspar granite Igneous rock
Alkali feldspar granite.
Holocrystalline texture, co****-grained.
Great amounts of pot****ium
feldspar (orthoclase...
- with
abundant small pink or red
pyralspite garnets in a 'granular'
holocrystalline matrix.
Concentrations of garnets, micas, or
amphiboles may form along...
-
black metallic and light-colored
Habit even-granular
texture Luster metallic to sub-metallic
Fracture conchoidal Tenacity brittle Texture holocrystalline...
