Jurassic-Cretaceous Boundary Strata of the Somanakamura Group in NE Japan and their Correlation with Coeval Terrestrial Deposits in ChinaEnglish Full Text
LI Wei;WAN Xiaoqiao;Atsushi MATSUOKA;ZHANG Shuqin;QU Haiying;Tsubasa TAMURA;Kohei YOSHINO;State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences;Department of Geology, Niigata University;Research Center of Paleontology and Stratigraphy,Jilin Univercity;
Abstract: Defining the Jurassic-Cretaceous boundary is a controversy in stratigraphic study of the world. It has been widely accepted that this boundary can be defined at the bottom of Berriasian in Tethys, with the appearance of the ammonite Berriasella jacobi dating to ca. 145 Ma. However, it is difficult for the widespread terrestrial deposits in China to correlate with the international standard of marine facies. The Somanakamura Group in Japan is represented by a succession of marinecontinental trans... More
Keywords：
Somanakamura Group; Jurassic-Cretaceous boundary; ammonites; spores and pollen; Tomizawa Formation; Koyamada Formation; Tuchengzi Formation;
- Series：
(A) Mathematics/ Physics/ Mechanics/ Astronomy
- Subject：
Biology; Geology
- Classification Code：
Q914.2
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