-
Poikilitic texture refers to
igneous rocks where large later-formed less
perfect crystals ('oikocrysts')
surround smaller early-formed
idiomorphic crystals...
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identified in
metamorphic rocks by its
swiss cheese appearance (with
poikilitic quartz) and
often mantled porphyroblastic character. The name is derived...
- The ages of
these rocks include 89 Ma for the
lavas and 75 Ma for the
poikilitic sills,
though some
sequences may have
erupted as late as 62–66 Ma, placing...
- The ages of
these rocks include 89 Ma for the
lavas and 75 Ma for the
poikilitic sills,
though some
sequences may have
erupted as late as 62–66 Ma, placing...
- lava
where phenocrysts had
started to form
prior to eruption.
Obsidian Poikilitic texture Tachylite Best,
Myron G. (2002).
Igneous and
Metamorphic Petrology...
-
building stone Ophitic dialect, a
variant of
Pontic Gr**** Ophitic, a type of
poikilitic texture in
igneous rocks This
disambiguation page
lists articles ****ociated...
-
crystals or as
large grains enclosing smaller grains of
other minerals (
poikilitic grains).
Geologists use
rigorous quantitative definitions to classify...
- (large
xenocryst surrounded by fine crystals),
Melange (mix of minerals),
Poikilitic (one
mineral grown around another),Polymorph (same
composition but different...
- Al2O3)
phenocrystic phlogopite;
titanian (5-10 wt.% TiO2) groundm****
poikilitic "tetraferriphlogopite";
titanian (3-5 wt.% TiO2), pot****ium (4-6 wt.%...
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Panidiomorphic Pegmatitic Peloidal Perthitic Phaneritic Phyllitic Pisolitic Poikilitic Poikiloblastic Porphyroclastic Porphyroblastic Porphyritic texture; see...
