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Microbial life in t...
Microbial life in the nascent Chicxulub crater
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- Schaefer, Bettina (author)
- Curtin University
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- Grice, Kliti (author)
- Curtin University
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- Coolen, Marco (author)
- Curtin University
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- Summons, Roger (author)
- Massachusetts Institute of Technology
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- Vui, Xingqian (author)
- Massachusetts Institute of Technology
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- Bauersachs, Thorsten (author)
- Christian-Albrechts-University
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- Schwark, Lorenz (author)
- Curtin University
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- Böttcher4, Michael (author)
- University of Greifswald
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- Bralowe, Timothy (author)
- Pennsylvania State University
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- Lyons, Shelby (author)
- Pennsylvania State University
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- Freeman, Katherine (author)
- Pennsylvania State University
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- Cockell, Charles (author)
- University of Edinburgh
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- Gulick, Sean (author)
- University of Texas at Austin
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- Morgan, Joanna (author)
- Imperial College, London
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- Whalen, Michael (author)
- University of Alaska
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- Lowery, Christopher (author)
- University of Texas at Austin
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- Vajda, Vivi (author)
- Naturhistoriska riksmuseet,Enheten för paleobiologi,Department of Geology, Lund University, Sweden
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(creator_code:org_t)
- Boulder : Geological Society of America, 2020
- 2020
- English.
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In: Geology. - Boulder : Geological Society of America. - 0091-7613 .- 1943-2682. ; 48, s. 328-332
- Related links:
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https://doi.org/10.1...
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https://nrm.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The Chicxulub crater was formed by an asteroid impact at ca. 66 Ma. The impact is considered to have contributed to the end-Cretaceous mass extinction and reduced productivity in the world’s oceans due to a transient cessation of photosynthesis. Here, biomarker profiles extracted from crater core material reveal exceptional insights into the post-impact upheaval and rapid recovery of microbial life. In the immediate hours to days after the impact, ocean resurge flooded the crater and a subsequent tsunami delivered debris from the surrounding carbonate ramp. Deposited material, including biomarkers diagnostic for land plants, cyanobacteria, and photosynthetic sulfur bacteria, appears to have been mobilized by wave energy from coastal microbial mats. As that energy subsided, days to months later, blooms of unicellular cyanobacteria were fueled by terrigenous nutrients. Approximately 200 k.y. later, the nutrient supply waned and the basin returned to oligotrophic conditions, as evident from N2-fixing cyanobacteria biomarkers. At 1 m.y. after impact, the abundance of photosynthetic sulfur bacteria supported the development of water-column photic zone euxinia within the crater.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
Keyword
- Cretaceous
- Paleogene
- extinction
- fossil flora
- palynology
- Mexico
- Diversity of life
- Livets mångfald
- The changing Earth
- Den föränderliga jorden
Publication and Content Type
- ref (subject category)
- art (subject category)
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Geology
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- By the author/editor
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Schaefer, Bettin ...
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Grice, Kliti
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Coolen, Marco
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Summons, Roger
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Vui, Xingqian
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Bauersachs, Thor ...
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show more...
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Schwark, Lorenz
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Böttcher4, Micha ...
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Bralowe, Timothy
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Lyons, Shelby
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Freeman, Katheri ...
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Cockell, Charles
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Gulick, Sean
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Morgan, Joanna
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Whalen, Michael
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Lowery, Christop ...
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Vajda, Vivi
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Other Earth and ...
- Articles in the publication
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Geology
- By the university
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Swedish Museum of Natural History