title: The Earth's Mantle: Evidence of Non-Newtonian Flow.
abstract: 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.
authors.forename: R L
authors.initials: RL
authors.lastname: Post
authors.forename: D T
authors.initials: DT
authors.lastname: Griggs