A river delta is a landfurm that is furmed at the mooth o a river, whaur the river rins intae an ocean, sea, estuary, loch, or reservoir. Deltas is furmed frae the deposeetion o the sediment carried bi the river as the pirr leaves the mooth o the river. Ower lang periods o time, this deposeetion bigs the characteristic geographic pattern o a river delta.
- Celoria, Francis (1966). "Delta as a geographical concept in Greek literature". Isis. 57 (3): 385–388.