| 词汇 | oligoclase |
| 释义 | BETA Examples of oligoclaseoligoclase isn’t in the Cambridge Dictionary yet. You can help! In the foliated gabbro, andesine also predominates, but with minor oligoclase. This growth of pargasite and oligoclase indicates further retrogression to upper amphibolite facies conditions following the high-pressure granulite facies overprint. Plagioclase is labradorite (phenocryst) and oligoclase (matrix) and has been variably sericitized. Plagioclase is oligoclase/andesine and aligned biotite and hornblende define the strong foliation. Plagioclase is mainly andesine in composition but varies from labradorite to oligoclase. Citlaltépetl lavas are mostly composed of two pyroxenes, hornblende and oligoclase-andesine phenocrysts in a microlitic and sometimes glassy groundmass. The relict porphyroblasts are surrounded by small garnet neoblasts that extend into and define the foliation, which are in contact with pargasite, oligoclase, titanite and occasionally small relict diopside grains. Staurolite is absent, muscovite occurs as traces, oligoclase is not zoned. Plagioclase is oligoclase and is generally sericitized. Oligoclase is a high sodium feldspar crystallizing in the triclinic system. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They are commonly oligoclase, and sometimes assume branching or feathery forms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The plagioclase is typically intermediate to sodic in composition, andesine to oligoclase. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Feldspar is present as plagioclase (typically oligoclase or andesine) with 10% or less alkali feldspar. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The plagioclase feldspar oligoclase also produces moonstone specimens. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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