The stratigraphic contact shows that the Baidafan Formation is volcanic rocks of Early Cretaceous age.
地层接触关系表明白大畈组为早白垩世火山岩。
Other bird "trace" fossils have been found in Utah and Alaska, but none from so far back as the early Cretaceous -- at the height of the age of dinosaurs.
在犹他州和阿拉斯加州还发现了另一种鸟的“足迹”化石，但都无法追溯到白垩纪早期——恐龙时代的鼎盛时期。
The age of the Fuding Formation and the Shimaoshan Group may be assigned to middle-late early Cretaceous and early late Cretaceous respectively.
福鼎组和石帽山群的时代应分别为早白垩世中、晚期和晚白垩世早期。
Its emplacement age was Early Cretaceous.
其侵位时代为早白垩世。
Its emplacement age was Early Cretaceous.
其侵位时代为早白垩世。
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