The Effect of Horizontal Stress Gradients on Layer Architecture

This paper expands upon previously known results to demonstrate that as the wavelength of bedrock obstacles changes, the flow routes around and over them change. This means that the response of isochronic layers to bedrock variability is wavelength dependent. The effects of basal topography and variations in basal sliding on layer architecture are investigated using finite element calculations and perturbation methods. Perturbation methods are valid for small amplitude bed features while being computationally undemanding, while finite element methods can deal with large amplitude perturbations, but are restricted to plane flows in this study.