High Strain Rocks GLY Spring, 2012

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Presentation transcript:

High Strain Rocks GLY 4310 - Spring, 2012 Petrology Lecture 10 High Strain Rocks GLY 4310 - Spring, 2012

High-Strain Terminology

Shear Zone Cross-Section Figure 22-2. Schematic cross section through a shear zone, showing the vertical distribution of fault-related rock types, ranging from non-cohesive gouge and breccia near the surface through progressively more cohesive and foliated rocks. Note that the width of the shear zone increases with depth as the shear is distributed over a larger area and becomes more ductile. Circles on the right represent microscopic views or textures. From Passchier and Trouw (1996) Microtectonics. Springer-Verlag. Berlin.

Shear Zone Terminology Figure 22-3. Terminology for high-strain shear-zone related rocks proposed by Wise et al. (1984) Fault-related rocks: Suggestions for terminology. Geology, 12, 391-394.