Explanation:

Anticline is an arch of stratified rock in which the layers bend downward in opposite directions from the crest — compare syncline.

a syncline is a fold with younger layers closer to the center of the structure, whereas an anticline is the inverse of a syncline. A synclinorium is a LARGE syncline with superimposed smaller folds.

A RIVER delta is a LANDFORM created by deposition of sediment that is carried by a river as the flow leaves its mouth 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.

A tributary or affluent is a stream or river that flows into a larger stream or main stem (or PARENT) river or a lake. ... The opposite to a tributary is a distributary, a river or stream that branches off from and flows away from the main stream. Distributaries are most OFTEN found in river deltas.

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