- A
phenocryst is an
early forming,
relatively large and
usually con****uous
crystal distinctly larger than the
grains of the rock groundm**** of an igneous...
-
common in
American usage,
while amygdale is more
common in
British usage.
Phenocryst –
Crystal larger than the rock
grains that
surround it in an
igneous rock...
-
partially resorbed phenocrysts or an
accessory phase in
basalts generated at depth.
Phlogopite mica is a
commonly known phenocryst and groundm**** phase...
-
crystals (
phenocrysts) that
formed before the
extrusion event that
brought the
magma to the surface,
embedded in a finer-grained matrix.
These phenocrysts are...
-
crystals (
phenocrysts) of
plagioclase formed prior to the
extrusion that
brought the
magma to the surface,
embedded in a finer-grained matrix.
Phenocrysts of...
-
layers of materials.
Porphyritic texture is one in
which larger pieces (
phenocrysts) are
embedded in a
background m**** made of much
finer grains. Fragmental...
-
rocks – An ultramafic, ultrapot****ic
intrusive rock
dominated by
mafic phenocrysts in a
feldspar groundm**** Latite – Type of
volcanic rock – A silica-undersaturated...
- Porphyritic, the
general igneous texture of a rock with two
distinct crystal (
phenocryst)
sizes Porphyry copper deposit, a
primary (low grade) ore
deposit of copper...
-
during eruption. Any
larger crystals visible to the
human eye,
called phenocrysts, form
earlier while slowly cooling in the
magma reservoir. When igneous...
- may
contain phenocrysts of
mafic minerals,
usually hornblende,
pyroxene or a
feldspar mineral, and may need to be
named after their phenocryst mineral, such...
