Fig. 4
From: Development of the Palu–Koro Fault in NW Palu Valley, Indonesia
a Profile A–A′ showing the topography from the mountain to the young alluvial fan. A topographic break between mountain and an old alluvial fan may mark the basin-bounding fault. A scarp separating old and young alluvial fans is interpreted as a normal fault. b Profile B–B′ of an intra-basin ridge, which emerges from adjacent topography on a young alluvial fan. See Fig. 2 for the location of profiles