Charles Lyell made a good estimate of the Tertiary Period from the fossil record, but his method could not be extended to earlier geological periods.
查尔斯·莱尔根据化石记录对第三纪作出了很好的估计，但他的方法不能扩展到更早的地质时期。
2
Basin development in Bobal Bay comprises two periods, i. e. rifting and depression, during which very thick Tertiary sequences deposited.
渤海湾盆地经历了断陷和拗陷两个发育阶段，其间接受了巨厚的第三纪沉积。
3
Late pool forming periods and the Tertiary undercompacted mudstone forming large area of pressure sealings are advantageous to the preservation of natural gas.