The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary
- P. Schulte, L. Alegret, P. Willumsen
- Environmental Science, GeographyScience
- 5 March 2010
Records of the global stratigraphy across this boundary are synthesized to assess the proposed causes of the Cretaceous-Paleogene boundary and conclude that the Chicxulub impact triggered the mass extinction.
The global vegetation pattern across the Cretaceous-Paleogene mass extinction interval: A template for other extinction events
- V. Vajda, A. Bercovici
- Geography, Environmental Science
- 1 November 2014
Indication of Global Deforestation at the Cretaceous-Tertiary Boundary by New Zealand Fern Spike
Recovery of New Zealand plant communities followed a pattern consistent with major climatic perturbations occurring after an impact winter that was possibly preceded by global wildfires.
Geochemical and mineralogical investigation of the Permian-Triassic boundary in the Continental Realm of the Southern Karoo Basin, South Africa
- L. Coney, W. Reimold, S. Kamo
- Environmental Science, Geography
- 2007
Pollen and spores in marine Cretaceous/Tertiary boundary sediments at mid‐Waipara River, North Canterbury, New Zealand
Abstract Terrestrial pollen and spores in late Maastrichtian to early Paleocene marine strata at mid‐Waipara, New Zealand, permit reconstruction of contemporary vegetation and paleoclimates. During…
Age and pattern of the southern high-latitude continental end-Permian extinction constrained by multiproxy analysis
- C. Fielding, T. Frank, J. Crowley
- Environmental Science, GeographyNature Communications
- 23 January 2019
A multi-proxy Permo-Triassic record from Australia is reported, resolving the timing of local terrestrial plant extinction and the relationship with environmental changes, andPalaeoclimate modelling suggests a moderate shift to warmer summer temperatures and amplified seasonality in temperature across the EPE, and warmer and wetter conditions for all seasons into the Early Triassic.
Fossilized Nuclei and Chromosomes Reveal 180 Million Years of Genomic Stasis in Royal Ferns
- B. Bomfleur, S. McLoughlin, V. Vajda
- Geography, Environmental ScienceScience
- 21 March 2014
An exquisitely preserved, calcified stem of a royal fern (Osmundaceae) from Early Jurassic lahar deposits of Sweden is presented in which authigenic mineral precipitation from hydrothermal brines occurred so rapidly that it preserved cytoplasm, cytosol granules, nuclei, and even chromosomes in various stages of cell division.
Ultrastructural Heterogeneity of Carbonaceous Material in Ancient Cherts: Investigating Biosignature Origin and Preservation.
- Y. Qu, A. Engdahl, Shixing Zhu, V. Vajda, N. McLoughlin
- GeographyAstrobiology
- 23 October 2015
This study demonstrates how Raman spectroscopy combined with micro-FTIR can be used to investigate the origin and preservation of silica-permineralized organics in siliceous deposits on Mars.
Early Jurassic annelid cocoons from eastern Australia
- Ida-Maria Jansson, S. McLoughlin, V. Vajda
- Environmental Science, Geography
- 13 August 2008
A small assemblage of clitellate annelid cocoons (egg cases) is described from the Early Jurassic Marburg Subgroup, Clarence-Moreton Basin, eastern Australia. Two complete specimens are preserved on…
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