Stratigraphic unit or tectonic unit?

是地层单元还是构造单元?

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Suibin depression, as a secondary tectonic unit, lies in the west of Sanjiang basin.

绥滨坳陷是三江盆地的次一级构造单元, 位于三江盆地的西部.

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Coal basin are a basic tectonic unit in the formation of coal measures.

含煤盆地是煤系形成的基本地质构造单元.

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Mantle branch is the third - grade tectonic unit during multiple evolution of mantle plume.

幔枝构造是地幔热柱多级演化的三级单元,其对内生矿产的成矿控矿作用十分明显.

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