Deformation of Bore Hole in Malaspina Glacier, Alaska

• Main Author: Sharp, Robert P.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Geological Society of America 1953
• Subjects: glacier; glaciers; Alaska
• Online Access: https://authors.library.caltech.edu/98570/; https://resolver.caltech.edu/CaltechAUTHORS:20190911-091110797

Demorest's (1942, p. 31-38; 1943, p. 365-373) exposition of extrusion flow in glaciers has not enjoyed universal acceptance. Skepticism has been especially strong in England where physicists have produced well-considered arguments and calculations showing that extrusion flow is a mechanical improbability (Orowan, 1949, p. 233-236; Nye, 1951, p. 565; 1952a; 1952b). Their analyses necessarily involve gross simplifications and are based in part upon assumptions concerning the physical properties and behavior of ice under long-continued confining pressure and stress so the validity of their conclusions needs independent confirmation.