Land plant extinction at the end of the Cretaceous: a quantitative analysis of the North Dakota megafloral record

  title={Land plant extinction at the end of the Cretaceous: a quantitative analysis of the North Dakota megafloral record},
  author={Peter Wilf and Kirk R. Johnson},
Abstract We present a quantitative analysis of megafloral turnover across the Cretaceous/Paleogene boundary (K/T) based on the most complete record, which comes from the Williston Basin in southwestern North Dakota. More than 22,000 specimens of 353 species have been recovered from 161 localities in a stratigraphic section that is continuous across and temporally calibrated to the K/T and two paleomagnetic reversals. Floral composition changes dynamically during the Cretaceous, shifts sharply… 

Cretaceous/Paleogene Floral Turnover in Patagonia: Drop in Diversity, Low Extinction, and a Classopollis Spike

A palynological analysis of a section in Patagonia that shows a marked fall in diversity and abundance of nearly all plant groups across the K/Pg interval, which greatly supports previous hypotheses of high latitude southern regions as biodiversity refugia during the end-Cretaceous global crisis.


Abstract For a long time, debate has taken place regarding the trends and extinction rates associated with the Creta-ceous-Paleogene (K-Pg) mass extinction event on land. While mainly focused on

Megafloral change in the early and middle Paleocene in the Williston Basin, North Dakota, USA

  • D. Peppe
  • Environmental Science, Geography
  • 2010

A preliminary test of the press-pulse extinction hypothesis: Palynological indicators of vegetation change preceding the Cretaceous-Paleogene boundary, McCone County, Montana, USA

Many workers consider the Cretaceous-Paleogene extinction the archetypal catastrophic pulse event caused solely by the Chicxulub bolide impact. However, based on a global scale analysis of marine

The First Plants to Recolonize Western North America Following the Cretaceous-Paleogene Mass Extinction Event

  • K. Berry
  • Environmental Science
    International Journal of Plant Sciences
  • 2021
Basal polypod ferns can be linked to Cyathidites spores in the northern Great Plains, perhaps because of a latitudinal climatic gradient, and this results could explain taxonomic inversion in the dual-phase fern spore spike between western North America and New Zealand.

Mammalian extinction, survival, and recovery dynamics across the Cretaceous-Paleogene boundary in northeastern Montana, USA

Together, the decoupled patterns of richness and relative abundances reveal the complexity of faunal dynamics during this seminal episode in mammalian history.

Mammalian Faunal Dynamics During the Last 1.8 Million Years of the Cretaceous in Garfield County, Montana

  • G. Wilson
  • Environmental Science, Geography
    Journal of Mammalian Evolution
  • 2005
This study provides an analysis of biotic change in successive mammalian communities during the last 1.8 million years of the Cretaceous (67.3–65.58 Ma) from the Hell Creek Formation in Garfield

A reconstruction of the early Palaeocene palaeovegetation of Turtle Mountain, south-western Manitoba, Canada

Abstract The lower Goodlands Member of the Turtle Mountain Formation is exposed in a streambank outcrop on the western flank of Turtle Mountain, south-western Manitoba, Canada (49°0′2″N,

The origin of the modern Amazon rainforest: implications of the palynological and palaeobotanical record

Northern South America harbours a highly diversified forest vegetation. However, it is not clear when this remarkable diversity was attained and how it was produced. Is the high diversity the product



Leaf-fossil evidence for extensive floral extinction at the Cretaceous-Tertiary boundary, North Dakota, USA

Paleoecology of a late Paleocene (Tiffanian) megaflora from the northern Great Divide Basin, Wyoming

To reconstruct a late Paleocene (Tiffanian) vegetation, we intensively sampled and censused plant megafossils of the Fort Union Formation from Bison Basin, Wyoming. Extensive sampling of this deposit

Plant and mammal diversity in the Paleocene to early Eocene of the Bighorn Basin

Cretaceous–Tertiary palynofloral perturbations and extinctions within the Aquilapollenites Phytogeographic Province

A combination of detailed, intermediate and large scale stratigraphic perspectives is necessary to understand the driving mechanisms for floral change across the Cretaceous–Tertiary (K–T) boundary,

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

A continuous marine sedimentary sequence spanning the Cretaceous/Tertiary (K/T) boundary has been identified in eastern Hokkaido, Japan, on the basis of planktonic foraminifera. The K/T boundary is

Vegetation, climatic and floral changes at the Cretaceous-Tertiary boundary

The western interior of North America has the only known non-marine sections that contain the iridium-rich clay interpreted as the Cretaceous–Tertiary (K–T) boundary1–7. Because vegetation and

Overview of the Late Cretaceous, early Paleocene, and early Eocene megafloras of the Denver Basin, Colorado

Late Cretaceous and Paleogene plant fossils collected at 149 localities in the Denver Basin, Colorado, are placed into a stratigraphic framework based on palynostratigraphy, magnetostratigraphy,

High-resolution leaf-fossil record spanning the Cretaceous/Tertiary boundary

THEORIES that explain the extinctions characterizing the Cretaceous/Tertiary (K/T) boundary1-3 need to be tested by analyses of thoroughly sampled biotas. Palynological studies are the primary means

Preliminary assessment of insect herbivory across the Cretaceous-Tertiary boundary : Major extinction and minimum rebound

Data indicate that highly and moderately specialized associations were preferentially culled at the K-T boundary, disproportionately enriching early Paleocene floras in generalized herbivores as dominant colonizers, suggesting a role for end-Cretaceous abiotic perturbation and consequent biotic response in the evolution of modern plant and insect associations.

Palynology of the Cretaceous-Tertiary boundary in central Montana: Evidence for extraterrestrial impact as a cause of the terminal Cretaceous extinctions

This report details a statistical analysis of palynological change across iridium-enriched claystones defining the Cretaceous-Tertiary (K-T) boundary in the Cretaceous Hell Creek Formation and