只有当沼泽盆地慢慢下陷时，厚厚的泥炭堆积才能形成。
Thick accumulations of peat can form only if the swamp basin slowly subsides.
下部层序形成于盆地裂陷早期，以粗碎屑快速堆积为主。
The lower sequence, formed in the early chasmic stage of the basin, mainly consists of rapidly accumulated coarse sediments.
门源盆地是祁连山中段的山间盆地，南北边缘均为断裂控制，发育古近系白杨河组、第四纪冰碛物和冰水堆积物。
The Menyuan Basin is an intermontane basin in the central segment of the Qilian Mountains, bounded by boundary faults on the north and south.
门源盆地是祁连山中段的山间盆地，南北边缘均为断裂控制，发育古近系白杨河组、第四纪冰碛物和冰水堆积物。
The Menyuan Basin is an intermontane basin in the central segment of the Qilian Mountains, bounded by boundary faults on the north and south.
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