Definition of Porphyry shell. Meaning of Porphyry shell. Synonyms of Porphyry shell

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Definition of Porphyry shell

Porphyry shell
Porphyry Por"phy*ry, n.; pl. Porphyries. [F. porphyre, L. porphyrites, fr. Gr. ? like purple, fr. ? purple. See Purple.] (Geol.) A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles. Porphyry shell (Zo["o]l.), a handsome marine gastropod shell (Oliva porphyria), having a dark red or brown polished surface, marked with light spots, like porphyry.

Meaning of Porphyry shell from wikipedia

- original copper porphyry. It forms when meteoric water (rain or snow melt infiltrating the Earth's surface) percolates through the copper porphyry. Dissolved...
- oxidation of iron and manganese. It is often incorrectly described as porphyry. Brisbane tuff began to be used during the period when Captain Patrick...
- which he claimed would be even more impressive than the "magnificent porphyry bowl from Nero's Golden House in the Sala Rotunda of the Vatican." In order...
- Christian philosophers influenced by Platonism. Neoplatonists including Porphyry, Iamblichus, and Proclus wrote extensive commentaries on the Oracles, all...
- imperial porphyry in antiquity. The quarry was active during the Greco-Roman period. Typical materials known from this site are: Reddish-Purple porphyry with...
- displaying short descriptions of redirect targets – An olivine-bearing basalt Porphyry – Textural form of igneous rock with large grained crystals in a fine matrix...
- the Archdiocese of Rio de Janeiro, media company Grupo Globo, oil company S**** do Brasil, environmental regulator IBAMA, National Institute of Historic...
- humans were capable of reason while animals were not. Philosophers such as Porphyry advocated for veganism. For the ancient Gr****s and Romans fishing served...
- palace and from the courtyard. The porch consists of multiple marble and porphyry pillars, with an ornate green and white-coloured wooden ceiling decorated...
- nephew of Domenico Fontana). The font was carved from the lid of the purple porphyry sarcophagus which had once held the remains of the Emperor Hadrian, and...