ABSTRACT Non-marine dinoflagellate fossil of middlecretaceous is very rare in the world.
中白垩世非海相沟鞭藻化石在世界上极为罕见。
2
The subsidence of Sunjiawan episode in MiddleCretaceous are further transferred eastward, and the half-graben defined by the fault F1 was formed.
中白垩世孙宗湾组的沉陷进一步向东侧移，形成了以F1断层为盆缘断层的半地堑；
3
Both the Pacific plate and the Siberian block slowed down in the early Cretaceous, and almost stopped in the middleCretaceous with the rapid decrease of abnormal heat in the mantle below.