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dextrorotation n.右旋,順時針方向旋轉。

dextrorotatory

The minerogenetic model of xikuangshan type copper deposit can be concluded that : in jinningian - chengjiangian , the activity of xiaojiang discordogenic fault form dextrorotation sub - structure in dongchuan ore area 昆陽裂谷內的多數銅礦同位素成礦年齡多集中在9 . 0億6 . 5億年之間,屬于晉寧-澄江期,與rodina大陸裂解時限相當。