Extrusion Flow in Glaciers: A description of tests to prove the hypothesis and some details regarding its influence on glacial erosion

• Published in: Journal of Glaciology
• Main Author: Seligman, G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1947
• Subjects: Earth-Surface Processes; Journal of Glaciology
• Online Access: http://dx.doi.org/10.1017/s0022143000001088; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000001088

In the middle of last century, Agassiz, Tyndall and others showed that a glacier flowed faster at its centre than at its margin. Partly from experiments and partly from the assumption that it behaved like a river, it became generally accepted that it also flowed faster at the surface than lower down. This belief was held until ten or fifteen years ago although search through earlier literature shows that evidence was accumulating which might disprove this.