End-Cretaceous devastation of terrestrial flora in the boreal Far East

Details End-Cretaceous devastation of terrestrial flora in the boreal Far East End-Cretaceous devastation of terrestrial flora in the boreal Far East

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.323..253s&link_type=abstract

Nature (ISSN 0028-0836), vol. 323, Sept. 18, 1986, p. 253-255.

Biology

12

Geobotany, Japan, Paleobiology, Plants (Botany), Vegetation Growth, Ecology, Extinction, Geochronology, Meteoritic Damage, Pollen

Scientific paper

Terrestrial palynomorphs from the Hokkaido marime sedimentary sequence spanning the Cretaceous/Tertiary (K/T) boundary record sudden changes in the floristic composition at the exact base of the boundary claystone layer; pollen abundance declines that are accompanied by an abrupt rise in the proportion of fern spores are noted to resemble the palynologically defined K/T boundary in the western interior of North America, which coincides with the top of an IR-rich clay layer. The possible synchronous occurrence of analogous floral changes at such widely separated regions implies a devastation of the land flora which although brief was intercontinental in scope, such as a catastrophic meteorite impact.

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