- 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...
-
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...
-
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...
-
during eruption. Any
larger crystals visible to the
human eye,
called phenocrysts, form
earlier while slowly cooling in the
magma reservoir. When igneous...
-
difference in size
between the tiny
matrix crystals and the much
larger phenocrysts.
Porphyries may be
aphanites or phanerites, that is, the groundm**** may...
-
layers of materials.
Porphyritic texture is one in
which larger pieces (
phenocrysts) are
embedded in a
background m**** made of much
finer grains. Fragmental...
-
peppering the
lighter color minerals.
Occasionally some
individual crystals (
phenocrysts) are
larger than the groundm****, in
which case the
texture is
known as...
-
rocks – An ultramafic, ultrapot****ic
intrusive rock
dominated by
mafic phenocrysts in a
feldspar groundm**** Latite – Type of
volcanic rock – A silica-undersaturated...
