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- GemRocks: Porphyry - Central Michigan University
DESCRIPTION: Porphyry is the term geologists apply to igneous rocks that consist of relatively large grains or crystals, called phenocrysts, surrounded by a finer grained material, usually called the groundmass Porphyries may be of just about any composition known for igneous rocks, and the groundmasses may be phaneritic, aphanitic, or even glass Colors - phenocrysts, which may or many not
- Porphyry - Wikipedia
Porphyry (geology), an igneous rock with large crystals in a fine-grained matrix, often purple, and prestigious Roman sculpture material Shoksha porphyry, quartzite of purple color resembling true porphyry mined near the village of Shoksha, Karelia, Russia Porphyritic, the general igneous texture of a rock with two distinct crystal (phenocryst) sizes Porphyry copper deposit, a primary (low
- Porphyry In Geology and Rock Examples? | Earth Know
Porphyry refers to igneous rocks with large, well-formed crystals in a finer-grained matrix common in andesite, basalt, rhyolite, or granite
- Porphyry – Imperial Stone of the Roman Empire | Select Stone
Porphyry is an igneous rock similar in composition to granite Unlike common granites, pophyry has large, light-colored crystals of quartz or feldspar floating in a red or purple fine-grained matrix of smaller crystals The word “porphyry” comes from the Latin word for purple, which was the color of nobility to the Romans Porphyry was Imperial Rome’s most prestigious stone for columns
- Porphyry | Neoplatonism, Logic, Commentaries | Britannica
Porphyry was a Neoplatonist Greek philosopher, important both as an editor and as a biographer of the philosopher Plotinus and for his commentary on Aristotle’s Categories, which set the stage for medieval developments of logic and the problem of universals Boethius’ Latin translation of the
- Stanford Encyclopedia of Philosophy
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- Porphyry: Mineral information, data and localities.
Not a root name, but a texturally-based name for any rock with coarse phenocrysts in a finer groundmass Most commonly used for felsic rocks such as
- PORPHYRY
References to other ancient works generally consist of author’s name, shortened (Latin) title, and an array of numerals The numerals may refer to pages and lines (so for Alexander’s commentaries), to volumes and pages (so for most of Galen), to pages and sections or to pages and columns and lines (so for Plato and Aristotle), to chapter and section and subsection (so for the majority of
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