Maastrichtian-Paleocene floras of Northeastern Russia and north Alaska and floral changes at the Cretaceous-Paleogene boundary

Taphofloras of the Koryak Upland and the Sagwon Locality of North Alaska are described in terms of their taxonomic composition, stratigraphic ranges, and comparison with coeval floras of Northeastern Russia and Alaska. Causes and amplitude of changes in Arctic floras across the Cretaceous-Paleogene...

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Bibliographic Details
Main Authors: Herman, AB, Moiseeva, MG, Spicer, RA, Ahlberg, Anders
Format: Article in Journal/Newspaper
Language:English
Published: Interperiodica 2004
Subjects:
Geotechnical Engineering
Cretaceous-Paleogene boundary
paleobotany
Northeastern Russia
America
North
Arctic
Koryak
Alaska
Online Access:https://lup.lub.lu.se/record/261322
Description
Summary:Taphofloras of the Koryak Upland and the Sagwon Locality of North Alaska are described in terms of their taxonomic composition, stratigraphic ranges, and comparison with coeval floras of Northeastern Russia and Alaska. Causes and amplitude of changes in Arctic floras across the Cretaceous-Paleogene boundary are considered. In its aspect and taxonomic composition, the Late Maastrichtian flora of the Amaam Lagoon (the Koryak Upland) is very close to the early Paleocene Sagwon flora of North Alaska. This is inconsistent with a hypothesis of the global ecological crisis at the Cretaceous-Paleogene boundary. Development of floras was controlled by long-term climatic fluctuations and by evolution and migration of plants.

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