Articles | Volume 12, issue 1
https://doi.org/10.5194/esurf-12-381-2024
https://doi.org/10.5194/esurf-12-381-2024
Research article
 | 
26 Feb 2024
Research article |  | 26 Feb 2024

Coevolving edge rounding and shape of glacial erratics: the case of Shap granite, UK

Paul A. Carling

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Short summary
Edge rounding in Shap granite glacial erratics is an irregular function of distance from the source outcrop in northern England, UK. Block shape is conservative, evolving according to block fracture mechanics – stochastic and silver ratio models – towards either of two attractor states. Progressive reduction in size occurs for blocks transported at the sole of the ice mass where the blocks are subject to compressive and tensile forces of the ice acting against a bedrock or till surface.