MAGNETOSTRATIGRAPHY, BIOSTRATIGRAPHY AND GEOCHRONOLOGY OF CRETACEOUS-TERTIARY BOUNDARY SEDIMENTS, RED DEER VALLEY

被引：66

作者：

LERBEKMO, JF ^{[1
]}

EVANS, ME ^{[1
]}

BAADSGAARD, H ^{[1
]}

机构：

[1] UNIV ALBERTA,DEPT PHYS,EDMONTON T6G 2M7,ALBERTA,CANADA

来源：

NATURE | 1979年 / 279卷 / 5708期

关键词：

D O I：

10.1038/279026a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Integrated magnetostratigraphic and biostratigraphic data for continental Cretaceous-Tertiary boundary sediments in Alberta allow a correlation with recognised sea floor magnetic anomalies 29 and 30. When compared with data from the marine Gubbio section in Italy, the correlation indicates that extinction of the dinosaurs on land was synchronous with foraminiferal extinctions in the sea which are equated with the Cretaceous-Tertiary boundary. We advocate that the base of anomaly 29 be tentatively accepted as the best worldwide physical approximation of the Cretaceous-Tertiary boundary. Eleven K-Ar dates on bentonite sanidines near this boundary yield a mean age of 63.1 ± 0.5(2σ) Myr. © 1979 Nature Publishing Group.

引用

页码：26 / 30

页数：5

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