Information - TS10 Feedback processes between landform evolution and lithosphere deformation (orogenic and intraplate settings) - what drives which? (co-listed in GM)
Event Information
Deformation of the lithosphere is responsible for the uplift of the earths surface and the creation of elevation and relief. Relief drives surface erosion and rock exhumation leading to a close correspondence between tectonic rock uplift rates, high rates of erosion and high relief. However, the feedback between tectonic rates and erosion rates presents a chicken-and-egg paradox; do climatically-modulated high rates of erosion drive rock uplift, or do high rates of rock uplift create the landscape capable of high rates of erosion? This session will address aspects of this problem and the dynamic system underlying it. In particular, we hope to address the spatial and temporal relationship between tectonic rates, characteristics of landscapes, and erosion rates from an observational or model aspect. Techniques that have been applied recently with success at resolving spatial variations in rate include: GPS measurement of tectonic rates; DEM analysis of landscapes; detrital cosmogenic dating for catchment erosion rate; and low-T thermochronometry for cooling and exhumation rates. Modeling studies that couple lithospheric deformation to erosional fluxes and gravitational forces from topography have also been useful in demonstrating linkages between processes. Papers that use these techniques, or others, for addressing rates and feedback processes are encouraged.
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