Climbing ripple cross-lamination forms when ripples (a lower flow regime bedform) migrate downstream while simultaneously experiencing net vertical aggradation due to a high rate of sediment fallout/supply exceeding what simple ripple migration alone would account for — requiring both ripple-forming (lower flow regime) hydraulic conditions and a surplus (high rate) of sediment supply.
Climbing ripples develop when medium to very fine sand is transported and deposited as ripples (a bedform characteristic of the lower flow regime, below the...
Full option-by-option analysis available to enrolled students.