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单词 Granite gneiss
释义

Granite gneiss

英语百科

Gneiss

Granitic gneiss from Enfield, New York
Orthogneiss from the Czech Republic
Henderson augen gneiss

Gneiss /ˈns/ is a common distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. It is often foliated (composed of layers of sheet-like planar structures). The foliations are characterized by alternating darker and lighter colored bands, called "gneissic banding".

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更新时间:2025/6/17 4:26:37