Morphodynamic limits to environmental signal propagation across landscapes and into strata

Stephan C. Toby, Robert A. Duller (), Silvio Angelis and Kyle M. Straub
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Stephan C. Toby: University of Liverpool
Robert A. Duller: University of Liverpool
Silvio Angelis: University of Liverpool
Kyle M. Straub: Tulane University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract The sedimentary record contains unique information about landscape response to environmental forcing at timescales that far exceed landscape observations over human timescales. However, stochastic processes can overprint and shred evidence of environmental signals, such as sediment flux signals, and so inhibit their transfer to strata. Our community currently lacks a quantitative framework to differentiate between environmental signals and autogenic signals in field-scale analysis of strata. Here we develop a framework and workflow to estimate autogenic thresholds for ancient sediment routing systems. Crucially these thresholds can be approximated using measurements that are readily attainable from field systems, circumventing the low temporal resolution offered by strata. This work demonstrates how short-term system dynamics can be accessed from ancient sediment routing systems to place morphodynamic limits on environmental signal propagation across ancient landscapes and into strata.

Date: 2022
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DOI: 10.1038/s41467-021-27776-6

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