Abstract

The geometry of a natural single-layer fold train is investigated to estimate the effective viscosity ratio between the folded layer and the surrounding medium. Different methods based on analytical solutions for folding yield consistent estimates for the range of viscosity ratios of between 20 and 70 and for values of the power-law exponent of the layer of between 1.8 and 5. The error range for such viscosity ratio estimates is roughly on the order of a factor of 2.

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