Figure G-34 shows a block of fine-grained limestone that was experimentally shortened by about 1% at room

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Figure G-34 shows a block of fine-grained limestone that was experimentally shortened by about 1% at room temperature. Four sets of fractures developed. Fractures of sets ‘‘a’’ and ‘‘b’’ are conjugate shear surfaces (the angular relationship between which can be measured directly on the diagram). Fractures of set ‘‘c’’ are extension fractures that formed during loading. Fractures of set ‘‘d’’ are extension fractures that formed during unloading when the orientation of σ3 became vertical in the rock-squeezing apparatus. Determine the Coulomb coefficient m for this rock.

Figure G-34Coulomb coefficient = Explanation 9 03

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Structural Analysis And Synthesis A Laboratory Course In Structural Geology

ISBN: 9781405116527

3rd Edition

Authors: Stephen M. Rowland, Ernest M. Duebendorfer, Ilsa M. Schiefelbein

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