Which mechanism creates crevasse splays when floodwater overtops a natural levee along a river?

💡 Explanation

When floodwater overtops a levee, a crevasse forms, causing a sudden decrease in stream carrying capacity because flow rapidly decelerates upon entering the floodplain, leading to sediment deposition close to crevasse opening. Therefore, crevasse splays develop through sedimentation, rather than compaction, sinuosity increases, or isostatic rebound, which involve different long-term geological processes.

• Which mechanism causes uplift and mountain formation along a reverse fault?
• Which effect arises from the deflection of prevailing winds by the Coriolis force?
• Which ecological outcome results when coastal upwelling is disrupted by increased surface water temperatures?
• Which mechanism primarily deflects geostrophic currents into coastal boundary currents along continental margins?
• Which risk increases when a building constructed on permafrost causes thawing of ground ice at the foundation?
• Which process is initiated at high elevations following glacial retreat from a cirque basin that exposes fractured bedrock?