Imperial College London
Alternate

ProfessorJoannaMorgan

Faculty of Engineering, Department of Earth Science & Engineering

Emeritus Professor of Geophysics
 
 
 
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Contact

 

+44 (0)20 7594 6423j.v.morgan

 
 
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Location

 

1.46CRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Smith:2020:10.5194/cp-16-1889-2020,
author = {Smith, V and Warny, S and Grice, K and Schaefer, B and Whalen, MT and Vellekoop, J and Chenot, E and Gulick, SPS and Arenillas, I and Arz, JA and Bauersachs, T and Bralower, T and Demory, F and Gattacceca, J and Jones, H and Lofi, J and Lowery, CM and Morgan, J and Nuñez, Otaño NB and O'Keefe, JMK and O'Malley, K and Rodríguez-Tovar, FJ and Schwark, L},
doi = {10.5194/cp-16-1889-2020},
journal = {Climate of the Past},
pages = {1889--1899},
title = {Life and death in the Chicxulub impact crater: a record of the Paleocene–Eocene Thermal Maximum},
url = {http://dx.doi.org/10.5194/cp-16-1889-2020},
volume = {16},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - latitudes, with sea surface temperatures at some localities exceeding the 35 C at which marine organisms experience heat stress. Relatively few equivalent terrestrial sections have been identified, and the response of land plants to this extreme heat is still poorly understood. Here, we present a new record of the PETM from the peak ring of the Chicxulub impact crater that has been identified based on nannofossil biostratigraphy, an acme of the dinoflagellate genus Apectodinium, and a negative carbon isotope excursion. Geochemical and microfossil proxies show that the PETM is marked by elevated TEXH86-based sea surface temperatures (SSTs) averaging ∼37.8 C, an increase in terrestrial input and surface productivity, salinity stratification, and bottom water anoxia, with biomarkers for green and purple sulfur bacteria indicative of photic zone euxinia in the early part of the event. Pollen and plants spores in this core provide the first PETM floral assemblage described from Mexico, Central America, and the northern Caribbean. The source area was a diverse coastal shrubby tropical forest with a remarkably high abundance of fungal spores, indicating humid conditions. Thus, while seafloor anoxia devastated the benthic marine biota and dinoflagellate assemblages were heat-stressed, the terrestrial plant ecosystem thrived.
AU  - Smith,V
AU  - Warny,S
AU  - Grice,K
AU  - Schaefer,B
AU  - Whalen,MT
AU  - Vellekoop,J
AU  - Chenot,E
AU  - Gulick,SPS
AU  - Arenillas,I
AU  - Arz,JA
AU  - Bauersachs,T
AU  - Bralower,T
AU  - Demory,F
AU  - Gattacceca,J
AU  - Jones,H
AU  - Lofi,J
AU  - Lowery,CM
AU  - Morgan,J
AU  - Nuñez,Otaño NB
AU  - O'Keefe,JMK
AU  - O'Malley,K
AU  - Rodríguez-Tovar,FJ
AU  - Schwark,L
DO  - 10.5194/cp-16-1889-2020
EP  - 1899
PY  - 2020///
SN  - 1814-9324
SP  - 1889
TI  - Life and death in the Chicxulub impact crater: a record of the Paleocene–Eocene Thermal Maximum
T2  - Climate of the Past
UR  - http://dx.doi.org/10.5194/cp-16-1889-2020
UR  - https://cp.copernicus.org/articles/16/1889/2020/
UR  - http://hdl.handle.net/10044/1/84009
VL  - 16
ER  -
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