Fig. 4.10. A macroform, probably of lateral-acc retion ty pe, with several internal third-orde r erosion surfaces indicating
changes in accretion direction. These are indicated by arrows. Cretaceous, Ga � toos Basin, South Africa
Fig. 4.11. Closeup of a fifth -o rder su rfa ce at the base of a
major sandstone sheet. Note mino r downcutting and
int ra clast breccia. There is little to distinguish this su rface
from others of third- to sixth-or der in small outcrops or
core. Permian, Poland