Figure F14. Close-up photograph of interval 183-1138A-78R-4, 69-81 cm, showing a typical clast distribution in the more pumice-rich parts of the pumice lithic breccia units (basement Subunits 2D, 2G, 2H, 2I, and 2J). Pumice clasts are rounded to subangular, and lithic clasts are abundant in the matrix.