A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy

Abstract ∘ dipping faults and allow the colluvial wedges to develop over 2000 model years. By tracking sediment transport time, velocity, and provenance, we classify cells into analogs for the debris and wash sedimentary facies commonly described in paleoseismic studies. High values of mobile regolith production and disturbance rates produce relatively larger and more wash-facies-dominated wedges, whereas lower values produced relatively smaller, debris-facies-dominated wedges. Higher lateral collapse rates lead to more debris facies relative to wash facies. Many of the modeled colluvial wedges fully developed within 2000 model years after the earthquake, with many being much faster when process rates are high. Finally, for scenarios with the same amount of vertical displacement, differently sized colluvial wedges developed depending on the rates of geomorphic processes and fault dip. A change in these variables, say by environmental change such as precipitation rates, could theoretically result in different colluvial wedge facies assemblages for the same characteristic earthquake rupture scenario. Finally, the stochastic nature of collapse events, when coupled with high disturbance, illustrates that multiple phases of colluvial deposition are theoretically possible for a single earthquake event.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy ; volume:10 ; number:2 ; year:2022 ; pages:329-348 ; extent:20 ; Earth surface dynamics ; 10, Heft 2 (2022), 329-348 (gesamt 20)

Contributors, Places and Time

• Creator: Gray, Harrison J. ; DuRoss, Christopher B. ; Nicovich, Sylvia R. ; Gold, Ryan D.

Further information

• DOI: 10.5194/esurf-10-329-2022
• URN: urn:nbn:de:101:1-2022041210233941406147
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:35 AM CEST