Theory 25/Competing Rates/Sedimentology
Coastlines Balance Two Rates
The claim
Whether a coastline advances or retreats is set by the ratio of sediment supply to accommodation space creation, not by either term alone.
01Mechanism
Sea level creates space while supply fills it; the balance determines the direction of shoreline movement at any location.
02Prediction
Shoreline change should track the ratio across sites.
03Refutation
Change tracking supply alone would remove accommodation.