rift valley basin 地堑盆地
A rift basin is a die young rift valley.
裂谷盆地是夭折的裂谷。
Sedimentation combination of the surrounding rocks suggests that they are formed in deep ocean basin environment, which belongs to rift valley basin.
矿化围岩的沉积组合反映其形成于较深海盆地的环境，为裂谷盆地构造背景。
This rift valley lake basin has obvious segmentations and multiple sources.
该块断湖盆具明显分割性和多源性。
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