GEOLOGY

Detailed explanation-1: -A delta is a landform composed of sediment deposited where a stream enters a larger, slower moving body of water, such as an ocean, a lake, or a larger river. The term delta comes from the triangular shape of the Greek letter delta ().

Detailed explanation-2: -Deltaic deposition occurs at the mouths of rivers, where they enter standing bodies of water such as lakes, seas, or oceans. Deltas are formed by the accumulation of sediment that is carried by the river and deposited at its mouth, as the river’s velocity decreases due to the standing body of water.

Detailed explanation-3: -A river delta is a landform shaped like a triangle, created by deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment.

Detailed explanation-4: -Deposition in deltas is concentrated at the delta front, where jet flow is initiated. Sand is laid down in river mouth bars which may coalesce into delta front sand sheets. Beyond the sand finer sediments are deposited in the prodelta, a marine environment wherein 75% of the actual deltamass accumulates.

Detailed explanation-5: -Deltas are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. Although very uncommon, deltas can also empty into land.