Latest Cretaceous/earliest Tertiary transition on Seymour Island, Antarctica

Seymour Island, Antarctica (64°17'S), offers the first opportunity to examine the crisis at the end of the Cretaceous from the high southern latitudes. The K/T boundary sequence on Seymour Island consists of a nearly continuous sequence of siliciclastic sediments deposited in a mid-shelf enviro...

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Bibliographic Details
Published in:Journal of Paleontology
Main Authors: Zinsmeister, William J., Feldmann, Rodney M., Woodburne, Michael O., Elliot, David H.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1989
Subjects:
Seymour
Seymour Island
Antarc*
Antarctica
Online Access:http://dx.doi.org/10.1017/s0022336000036453
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000036453
Description
Summary:Seymour Island, Antarctica (64°17'S), offers the first opportunity to examine the crisis at the end of the Cretaceous from the high southern latitudes. The K/T boundary sequence on Seymour Island consists of a nearly continuous sequence of siliciclastic sediments deposited in a mid-shelf environment. The faunal changes across the boundary occur through a 30-m interval with no single extinction horizon, in contrast to other well-studied K/T boundary sections. The “expanded” nature of the Seymour Island section makes placement of the K/T boundary difficult because boundary indicators such as planktic foraminifera, ammonites, and dinocysts disappear at different levels within the section.

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