greisen是什么意思

发布时间：2020-11-27 作者：英语查

greisen 是什么意思

	n. 【地质学；地理学】云英岩。

a granitic rock composed of quartz and mica

Greisen is a highly altered granitic rock or pegmatite. Greisen is formed by autogenic alteration of a granite and is a class of endoskarn.

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