Figure F8. Large metasedimentary rock fragment consisting of quartz and feldspar silt in a micaceous groundmass (Sample 210-1276A-93R-1, 24 cm). Note blue secondary pore in clast (dissolved feldspar or dense mineral?). A. Plane-polarized light. B. Cross-polarized light.

Figure F8. Large metasedimentary rock fragment consisting of quartz and feldspar silt in a micaceous groundmass (Sample 210-1276A-93R-1, 24 cm). Note blue secondary pore in clast (dissolved feldspar or dense mineral?). A. Plane-polarized light. B. Cross-polarized light.