Figure F10. Basement Subunit 1A. A. Clast rounding vs. number of clasts (R = rounded, SR = subrounded, SA = subangular, A = angular). Clasts are dominated by subrounded shapes. B. Internal texture vs. number of clasts (BX = breccia, CB = contorted flow banding, PB = planar flow-banding, M = massive). Clasts are dominated by planar flow-banded internal textures with lesser and approximately equal numbers of massive clasts and clasts with contorted flow banding.