Imperial College London
Alternate

PETER A. ALLISON

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Earth Science
 
 
 
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Contact

 

+44 (0)20 7594 6479p.a.allison Website

 
 
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Location

 

4.84Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lyster:2020:10.1111/bre.12442,
author = {Lyster, SJ and Whittaker, AC and Allison, PA and Lunt, DJ and Farnsworth, A},
doi = {10.1111/bre.12442},
journal = {Basin Research},
title = {Predicting sediment discharges and erosion rates in deep time—examples from the late Cretaceous North American continent},
url = {http://dx.doi.org/10.1111/bre.12442},
volume = {32},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Depositional stratigraphy represents the only physical archive of palaeosediment routing and this limits analysis of ancient sourcetosink systems in both space and time. Here, we use palaeodigital elevation models (palaeoDEMs; based on highresolution palaeogeographic reconstructions), HadCM3L general circulation model climate data and the BQART suspended sediment discharge model to demonstrate a predictive, forward approach to palaeosediment routing system analysis. To exemplify our approach, we use palaeoDEMs and HadCM3L data to predict the configurations, geometries and climates of large continental catchments in the Cenomanian and Turonian North American continent. Then, we use BQART to estimate suspended sediment discharges and catchmentaveraged erosion rates and we map their spatial distributions. We validate our estimates with published geologic constraints from the Cenomanian Dunvegan Formation, Alberta, Canada, and the Turonian Ferron Sandstone, Utah, USA, and find that estimates are consistent or within a factor of two to three. We then evaluate the univariate and multivariate sensitivity of our estimates to a range of uncertainty margins on palaeogeographic and palaeoclimatic boundary conditions; large uncertainty margins (≤50%/±5°C) still recover estimates of suspended sediment discharge within an order of magnitude of published constraints. PalaeoDEMs are therefore suitable as a firstorder investigative tool in palaeosediment routing system analysis and are particularly useful where stratigraphic records are incomplete. We highlight the potential of this approach to predict the global spatiotemporal response of suspended sediment discharges and catchmentaveraged erosion rates to longperiod tectonic and climatic forcing in the geologic past.
AU  - Lyster,SJ
AU  - Whittaker,AC
AU  - Allison,PA
AU  - Lunt,DJ
AU  - Farnsworth,A
DO  - 10.1111/bre.12442
PY  - 2020///
SN  - 0950-091X
TI  - Predicting sediment discharges and erosion rates in deep time—examples from the late Cretaceous North American continent
T2  - Basin Research
UR  - http://dx.doi.org/10.1111/bre.12442
UR  - https://onlinelibrary.wiley.com/doi/full/10.1111/bre.12442
UR  - http://hdl.handle.net/10044/1/79333
VL  - 32
ER  -
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