Web1. júl 2000 · Olivine phenocryst compositions and whole-rock chemical compositions are used to identify primitive picrite basalts from widely separated parts of the Deccan flood basalt province. Overall, primitive picrites constitute a significant volume of rocks within the province. Most were probably emplaced along deep faults in the Cambay graben and ... Web6. aug 2015 · The phenocryst was albitized. The matrix around the plagioclase phenocryst consists of clinopyroxene, hornblende and plagioclase. Some clinopyroxene and hornblende were altered to chlorite. Many ...
phenocrystal - Wiktionary
Webphenocrystic. (ˌfiːnəˈkrɪstɪk ) adjective. relating to a phenocryst. Collins English Dictionary. Copyright © HarperCollins Publishers. Webphenocryst noun phe· no· cryst ˈfē-nə-ˌkrist : one of the prominent embedded crystals of a porphyry phenocrystic ˌfē-nə-ˈkri-stik adjective Example Sentences Recent Examples on … radvan uni bonn
Phenocryst - chemeurope.com
Webphenocryst noun any relatively large crystal embedded in a more fine-grained or glassy igneous rock Freebase (0.00 / 0 votes) Rate this definition: Phenocryst A phenocryst is a relatively large and usually conspicuous crystal distinctly larger than the grains of the rock groundmass of a porphyritic igneous rock. WebMegacryst. In geology, a megacryst is a crystal or grain that is considerably larger than the encircling matrix. They are found in igneous and metamorphic rocks. [1] Megacrysts can be further classified based on the nature of their origin, either as: [2] Phenocrysts, which crystallize in molten rock material ( lava or magma) and are hence an ... Webphenocryst n any of several large crystals that are embedded in a mass of smaller crystals in igneous rocks such as porphyry (C19: from pheno- (shining) + crystal) drama\u0027s uy