a valley
A basin
A depression on the surface of the Earth created by groundwater is known as a cone of depression.
A mountain is a natural, large elevation in the Earths surface. A basin is a depression in the Earths surface containing water.
a valley
A basin
a valley, a canyon, a hole, a gulch, a hollow, a gully
A concave mark is called a "dent" or "depression." It refers to an indentation or hollow area in a surface.
A hollow or depression in the Earth's surface is known as a cavity or crater. These formations can occur naturally due to erosion, volcanic activity, or impacts, or they can be human-made through activities like mining or excavation. Cavities and craters can vary in size and shape depending on the geologic processes that formed them.
Botches
Deposition by erosion , could fill a depression , the same erosion creates depressions.
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Brain Tumors