根据本区寒武系的岩石学特征、生物组合特征和沈积构造特征重建了各组段的沈积坏境。

According to petrology, biological assemblage and structural features of carbonate rocks, the sedimentary environments of formations of the carbonates in Yichang area are reconstructed.

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然后从沉积微相分析入手，研究了沉积相标志，包括地层岩石的颜色、沉积构造、粒度分布、古生物学等。

Then, beginning with the microfacies, signs of sediment facies, including rock's colour, sediment structure, granularity distribution, fossil and so on, are studied.

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造山带火山岩石学研究的主要目的在于重溯造山带的构造-岩浆演化历史。

The study of volcanic rocks in orogenic belts aims mainly at retracing the tectono_magmatic evolutionary history of orogenic belts.

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