菊花石
- 网络chrysanthemum stone
菊花石-
菊花石形成于距今约2.8亿年前。
The chrysanthemum stone was former 280,000,000 years ago .
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菊花石生长几何模型
The Geometric Growth Model of the Chrysanthemum Stone
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论华南栖霞组中的菊花石
Reviews on Chrysanthemum stones from the Qixia Formation in South China
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菊花石及其他两种放射状形貌对比研究
Comparative study of radial morphology of the celestite chrysanthemum stone to other minerals
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依据其菊花石原生矿物组成，将我国菊花石划分为天青石型（浏阳菊花石为典型）、菱锶矿型（宣恩、来宾菊花石）和天青石－菱锶矿混合型（永丰型菊花石）菊花石三种类型。
According to the primary composition , the chrysanthemum stones in china are divided into three types : i. e. celestite type ;