ROCK-FORMULA.

【类型】期刊

【作者】李四光，仲揆（Geological Institute National University of Peking;Geological Institute National University of Peking）

【作者单位】Geological Institute National University of Peking;Geological Institute National University of Peking

【刊名】地质学报

【关键词】 刃刀

【ISSN号】0001-5717

【页码】P99-104

【年份】2019

【期号】第2期

【期刊卷】4;|5;|2

【摘要】In a paper published sometime ago,(1) I ventured to show how it might be possible to express symbolically the composition and structure of an igneous rock. The type of formula then suggested, though may possess some advantage over the so-called rock formula of Osann, is, for two obvious

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