Figure F41. Photomicrograph of a basaltic clast, Hole U1348A. Alteration and mineralogy of this basaltic clast is similar to alteration of basaltic rocks recovered from top of Hole U1347A. The groundmass is highly altered to brown clays, whereas plagioclase microliths still remain relatively unaffected by alteration (Thin Section 158; Sample 324-U1348A-14R-3, 54–56 cm). Cross-polarized light.
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