erosion
it is a plain
Geographically, a "plain" is a large, treeless area of level or nearly level land. By convention the term "plain" is usually used to describe a low level flat area such as a coastal plain, sea floor plain, a river plain or a lunar plain (mare) rather than an elevated flat area which would be called a plateau.
The surrounding area eroded away and washed away.
If the level of ozone is below certain concentration, then it is ozone depleted. It is called as ozone hole.
A delta forms when the sediment from one area is brought to another area by a river after being eroded. The river will deposit the sediment at the mouth of the river, forming the delta.
erosion
a mountain
I think it is called a plateau
it is a plain
A plateau.
a plateu
Land that is nearly surrounded by water is called a peninsula.
The soil in this area was eroded after all the trees were cut.
It is called an ulcer
peninsula means nearly an island. its called greenwich peninsula because it is nearly an island
That I believe, would be the Earth's Crust.
plateu