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Sheared worm tubes that were originally perpendicular to bedding. The bedding runs across the field of view dipping about 20 degrees to the left. The bed behind the lens cap has lines running accross it, bedding perpendicular at the bottom and at about 45 degrees to bedding at the top. These lines are caused by worm tubes which were all perpendicular to bedding before deformation. The upper part of the bed has suffered top to the right shear. (photo: Rob Butler)