Instability modelling of drumlin formation incorporating lee-side cavity growth

The instability theory of drumlin formation applied to Newtonian viscous ice of finite depth

Supplementary data pa.2010.0017.DC1.html http://rspa.royalsocietypublishing.org/content/suppl/2010/03/08/rs "Data Supplement" References html#ref-list-1 http://rspa.royalsocietypublishing.org/content/466/2121/2673.full. This article cites 40 articles, 1 of which can be accessed free Subject collections (16 articles) glaciology • (79 articles) mathematical modelling • Articles on similar topic...

An instability me hanism for drumlin formation

The instability theory of drumlin formation and its explanation of their varied composition and internal structure

Despite their importance in understanding glaciological processes and constraining large-scale flow patterns in palaeo-glaciology, there is little consensus as to how drumlins are formed. Attempts to solve the ‘drumlin problem’ often fail to address how they are created from an initially flat surface in the absence of obvious cores or obstacles. This is a key strength of the instability theory,...

Looking through drumlins: testing the application of ground-penetrating radar

Ground-penetrating radar (GPR) is becoming a commonly applied technique in geomorphology. However, its use in the study of subglacial bedforms has yet to be fully explored and exploited. This paper presents the results of a GPR feasibility study conducted on a drumlinized terrain in Cumbria, UK, where five drumlins were investigated using multiple radar antenna frequencies. The site was selecte...

On the size and shape of drumlins

We provide a mechanistic explanation for observed metrics for drumlins, which represent their sizes and shapes. Our explanation is based on a concept of drumlin growth occurring through a process of instability, whereby small amplitude wave forms first grow as ice slides over a bed of deformable sediments, following by a coarsening process, in which the wavelength as well as the relief of the d...