DELTA

• Delta forms when river enters into the sea

• Shows progradational pattern : coarsening upward (regression)

• Triangular shaped

3 SETS OF DELTA

• Foreset : thicker layer of coarser grain sediments

• Bottomset : thinner layer of fine grained sediments

• Topset : gentle seaward slope

TYPES OF DELTA

• River dominated : Mississippi, Parana

• Tide dominated : Ganga - Brahmaputra, fly river , Amazon river

• Wave dominated : Nile river, Danube

OTHER TYPES

• Arcuate delta : fan shaped - Nile river

• Bird foot delta : shape of foot of bird - Mississipi

• Cuspate delta : sediment deposited onto a straight shore line

• Estuarine delta

• Lacustrine delta

• Truncated delta

• Abandoned delta