Morphotectonic analysis of the studied site (“Dark cloud Creek”) and its series of alluvial terraces. a: Satellite image (PLEIADE). b: Slope map. c: Map of alluvial terraces (T) and associated drainages (D). d: Topographic profiles showing the relations between alluvial surfaces and drainages. When the label of terraces do not specify their relationship with their genetic drain, these terraces are associated with drain D3. Fault is materialized by the white dashed line.