 |
 |
The early issues of the Journal of Glaciology have a number of excellent articles on the subject by, among others, John Nye of the University of Bristol. His work was important in helping inspire my approach to the study of rotated garnets and their application, in collaboration with colleagues, to tectonic problems in rocks* other than glaciers in the Northern Appalachians and the Alps. Of course, one shouldn't forget the Nineteenth Century work of Tyndall. As I recall, he discussed grizzly examples of strain measured by the reappearance of chamois and a human corpse that had been accidentally incorporated in Alpine glaciers. The best place to start is the excellent paperback by W.S.B. Paterson entitled "The Physics of Glaciers," 2nd edition (1981), which contains most of the important references up to the time of publication. I hope this helps. John Rosenfeld *: 1968: John L. Rosenfeld, "Garnet Rotations Due to the Major Paleozoic Deformations in Southeast Vermont," Chap. 14 in Studies of Appalachian Geology: Northern and Maritime, ed. by E-an Zen, W.S. White, J.B. Thompson and J.B. Hadley [New York, Wiley-Interscience], p. 185-202. 1984: Hepburn, J.C., Trask, N.J., Rosenfeld, J.L., and Thompson, J.B.,Jr., "Bedrock geology of the Brattleboro Quadrangle, Vermont-New Hampshire," Vermont Geol. Survey Bull. 32, Agency of Environmental Conservation, Dept. of Water Resources and Environmental Engineering, Montpelier, Vermont, 162 p. (with colored geologic map and cross sections). 1987: Rosenfeld, John L., "Rotated Garnets," p. 702-709 in Encyclopedia of Structural Geology and Plate Tectonics, C.K.Seyfert, Editor, Volume X of Encyclopedia of Earth Sciences Series, R.W. Fairbridge, Series Editor, New York, Van Nostrand - Reinhold, 876 p. 1989: J.N. Christensen, Rosenfeld, J.L., and D.J. DePaolo, "Rates of tectonometamorphic processes from rubidium and strontium isotopes in garnet," Science, v. 244, p. 1465 - 1469. 1994: Christensen, J.N., Jane Selverstone, J.L. Rosenfeld, D.J. Depaolo. (1994). Correlation by Rb-Sr geochronology of garnet growth histories from different structural levels within the Tauern Window, eastern Alps. Contributions to Mineralogy and Petrology. 118: 1-12. >Hello Everybody, > >I'm setting an exercise for students to calculate shear >strains in glaciers. I've tackled problems such as this >myself as a student, always under the impression that they >were based on actual experiments, but I don't have any >references to these. >Can anyone out there please help with references to real >examples of glacier strain experiments? The kind of thing >I'm thinking of is: > "In 1950 a group of structural geologists, thwarted by bad >weather and unable to complete their climb, instead hammer >their pitons into a glacier, in a line perpendicular to its >margins. In 1980 they come back to relocate the stakes with >a metal detctor and find that the stakes have been displaced >. . . " > >with thanks in advance >Steve White -- John L. Rosenfeld Department of Earth & Space Sciences University of California, Los Angeles Los Angeles, California 90095-1567 Phone: 310-825-1505 e-mail: [log in to unmask] website: <http://www.ess.ucla.edu/facpages/rosenfel.html>