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词汇 Quartz porphyry
分类 英语词汇 英语翻译词典
释义

Quartz porphyry

英语百科

Quartz-porphyry

Quartz porphyry from the island of Alnӧ, Sweden. Phenocrysts of clear glassy rounded quartz and white orthoclase feldspar are set in a fine-grained matrix. Sample is just over 10 cm long

Quartz-porphyry, in layman's terms, is a type of volcanic (igneous) rock containing large porphyritic crystals of quartz. These rocks are classified as hemi-crystalline acid rocks.

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