The Earth's Mantle: Evidence of Non-Newtonian Flow

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Science  28 Sep 1973:
Vol. 181, Issue 4106, pp. 1242-1244
DOI: 10.1126/science.181.4106.1242


Recent information from experimentally deformed dunite coupled with a reanalysis of data on the Fennoscandian postglacial rebound suggest that the rheological behavior of the upper mantle is distinctly non-Newtonian, and that the shear strain rate is proportional to the shear stress raised to about the third power.