早更新世晚期，中更新世初期，第三排褶皱开始形成。
The third fold developed between late early Pleistocene and early Middle Pleistocene.
上新世晚期，早更新世初期，第二排褶皱开始形成。
The second fold developed between late the Miocene and the initial stage of Early Pleistocene.
上新世晚期，早更新世初期，第二排褶皱开始形成。
The second fold developed between late the Miocene and the initial stage of Early Pleistocene.
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