Deformation textures in tectonites

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Abstract
A variety of deformation textures may be present in low temperature tectonites that have not been modified extensively by post-deformational recrystallization. These include gross grain shape, granular, breccia, pull-apart, strain-shadow, goatee, and shear-step textures. A study of these textures will reveal the behavior of the rock during deformation, specifically: (a) whether deformation took place under conditions of high or low intergranular cohesion, and (b) the relative importance of crystallographic gliding and intergranular movement between grains.No study of deformed rocks is complete without a strain analysis. Strain analyses should include grain shapes, as well as description and interpretation of the various deformation textures.

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