I know that a peneplain is a flat area due to erosion, but what is the term for a flat area due to deposition?

I am generally very successful with searching the internet, but I could not find the term I am looking for.
Could you please help? Thank you!

Are you looking for delta?

http://en.wikipedia.org/wiki/River_delta

Thank you Ms. Sue but, unfortunately, this is not the term I was searching for. (It is a longer name. I know there is a pediment, but that, too, is due to erosion, if I remember correctly.)

Delta was a good guess. I also thought of reef. It may be here, along with someother interesting term s; A few other terms:

floodplain -- n. The flat area on either side of an active river channel that can be covered in water when the river is in flood. When the channel is breached, sediment-laden waters spread across the floodplain. When the waters recede, a layer of sediment is left behind. When the floodplain is not covered with water, it commonly supports vegetation and soil formation.

loess -- n. A widespread, loose deposit consisting mainly of silt; most loess deposits formed during the Pleistocene as an accumulation of wind-blown dust carried from deserts, alluvial plains, or glacial deposits.

marine terrace -- n. A platform of marine deposits (typically sand, silt, gravel) sloping gently seaward. Such a platform may be exposed along the coast, forming cliffs, due to uplift and/or the lowering of sea level, e.g., marine terraces of coastal Southern California.
moraine -- n. A mound or ridge of sediment deposited by a glacier; lateral moraine- n. deposited to the side of a glacier; terminal moraine- n. deposited to the front of a glacier; ground moraine- n. deposited on the land surface.

red bed -- n. Sedimentary layers composed primarily of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of iron oxides; often used in reference to the Permian or Triassic sediments of the western U.S.

Sra (aka Mme)

If not "floodplain," here is one more site to check:

(Broken Link Removed)

Sra (aka Mme) (et c'est tout de moi!)

Merci beaucoup, Mme; je vais étudier les emplacements que vous avez proposés.

Of course! I'd be happy to help you find the answer you're looking for.

When it comes to a flat area formed by the accumulation of sediment, the term you are looking for is "plain" or "alluvial plain." It is a type of landscape that is formed by the deposition of sediments brought by rivers, streams, or glaciers. Alluvial plains are typically characterized by flat, fertile land due to the continuous deposition of sediment over long periods of time.

To find this term, you can use search engines like Google or Bing by entering keywords such as "flat area formed by deposition," "plain due to sediment accumulation," or "alluvial plain." It's possible that your initial search may not have been successful because the term "alluvial plain" is not as widely known as "peneplain." However, with the correct keywords, you should be able to find more information about alluvial plains.