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{Artemieva:2020:10.1029/2019gl086562,
author = {Artemieva, N and Morgan, J},
doi = {10.1029/2019gl086562},
journal = {Geophysical Research Letters},
pages = {1--8},
title = {Global KPg layer deposited from a dust cloud},
url = {http://dx.doi.org/10.1029/2019gl086562},
volume = {47},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Although it is widely agreed that the distal KPg clay layer contains ejecta from the Chicxulub impact site, no current models can explain how these ejecta travel from the impact site around the globe. A widely accepted hypothesis is that impact spherules and shocked minerals in the layer were ejected from an expanding impact plume and traveled to their final destination on a ballistic path. Shocked minerals, however, are ejected at too low a velocity to reach distal sites, and plausible ballistic ejection models cannot explain the observed ejecta distribution. Using a suite of numerical simulations, we find that intense interactions between the ejecta curtain and atmosphere generate a fastmoving dust cloud traveling at speeds of a few kilometers per second, which carries a substantial fraction of ejecta, including shocked minerals, to distal sites. We conclude that ejecta curtain material must make a major contribution to the formation of the distal KPg layer.
AU  - Artemieva,N
AU  - Morgan,J
DO  - 10.1029/2019gl086562
EP  - 8
PY  - 2020///
SN  - 0094-8276
SP  - 1
TI  - Global KPg layer deposited from a dust cloud
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1029/2019gl086562
UR  - https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL086562
VL  - 47
ER  -
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