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| details | Early Tertiary | China(Shantung) | Wang,K.-F. et al. A study on the algal assemblages of crude oil from Buried Hill and the source Bed of oil in China | 1986 | |
| details | Tertiary | China(Shansi) | Sun,X. et al. Cenozoic sporo-pollen assemblage of the Weihi Basin, Shaanxi. | 1980 |