late oligocene-middle miocene
late oligocene-middle miocene
晚渐新世-中新世中期
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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During the period from Late Oligocene to Middle Miocene, the basin changed from rifting to depression, and the depositional area continued to expand in the Marine environment.
晚渐新世—中中新世，盆地逐渐由断陷转为断拗，沉积范围不断扩大，整体处于海相沉积环境。
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