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2007•Journal of the Geological SocietyRequires access

Tectonic and climatic controls of alluvial-fan size and source-catchment relief

W. Brian Dade, Meagan E. Verdeyen

Open publisher page 39 citations

Abstract

The geometries of alluvial fans and their upland catchments subject to known rates of basin subsidence V and upland precipitation P , respectively, are compared with predictions from a quantitative analysis of an idealized landscape. We find that the dimensionless ratio V / P explains systematic trends in relative fan size and source catchment relief previously reported from environmentally wide-ranging regions worldwide, and contributes to the interpretation of recently reported observations of fan-like phenomena on Mars.

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What this paper is about

The geometries of alluvial fans and their upland catchments subject to known rates of basin subsidence V and upland precipitation P , respectively, are compared with predictions from a quantitative analysis of an idealized landscape. We find that the dimensionless ratio V / P explains systematic trends in relative fan size and source catchment relief previously reported from environmentally wide-ranging regions worldwide, and contributes to the interpretation of recently reported observations of fan-like phenomena on Mars.

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Available abstract

The geometries of alluvial fans and their upland catchments subject to known rates of basin subsidence V and upland precipitation P , respectively, are compared with predictions from a quantitative analysis of an idealized landscape. We find that the dimensionless ratio V / P explains systematic trends in relative fan size and source catchment relief previously reported from environmentally wide-ranging regions worldwide, and contributes to the interpretation of recently reported observations of fan-like phenomena on Mars.

Key concepts: Alluvial fan, Geology, Alluvium, Drainage basin, Tectonic subsidence, Subsidence, Mars Exploration Program, Tectonics

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