A sink is usually associated with a kettlehole or a kame.
These are glacial relics.
Firstmate
It is called a karst landscape.
topography
There's no such thing as a topography.
The topography of the ocean floor
A selection of articles related to River Topography
The plural of topography is topographies. As in "these topographies are interesting".
land has topography... not sharks
It is called a karst topography.
(Topography deals with the physical features of a geographic area.)"The topography of the region suggests ancient volcanic activity.""The map of Middle Earth's mountains is excellent fictional topography.""We spent the morning discussing the topography of England's Thames valley."
Topography. (top-aw-graffy)
Topography contributes to soil through Pokemon.
Topography is an important factor for soil formation