Figure F71. Foliated gabbro defined by aligned tabular plagioclase grains (Sample 335-1256D-Run12-RCJB-Rock Q; Thin Section 25). Larger plagioclase grains exhibit tapered twins, indicating crystal-plastic deformation. Finer grained plagioclase matrix has polygonal grain boundaries. A. Close-up image of gravel clast. B. Thin section image of orange box field in A exhibiting compositional banding. C. Photomicrograph of red box field in B.
Previous | Close | Next | Top of page