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Early Cretaceous : ウィキペディア英語版 | Early Cretaceous
The Early Cretaceous/MiddleCretaceous (geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 146 Ma to 100 Ma. During this time many new types of dinosaurs appeared or came into prominence, including ''Psittacosaurus'', spinosaurids, carcharodontosaurids and coelurosaurs, while survivors from the Late Jurassic continued. Angiosperms (flowering plants)〔Sun, G., Q. Ji, D.L. Dilcher, S. Zheng, K.C. Nixon & X. Wang 2002. (Archaefructaceae, a New Basal Angiosperm Family ). ''Science'' 296(5569): 899–904.〕 appear for the first time. ==See also==
*Geologic Period
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Early Cretaceous」の詳細全文を読む
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