Nadir (topography)

The Badwater Basin in Death Valley, California , the nadir of the North American Continent

In topography, a nadir is a point on a surface that is lower in elevation than all points immediately adjacent to it. Mathematically, a nadir is a local minimum of elevation. A nadir may be the lowest point of a dry basin or depression, or the deepest point of a body of water or ice. The nadir of a body of water is often called a "deep", as in the Challenger Deep, the nadir of the Earth's oceans.

## See also

* Depression (geology)
* Endorheic basin
* Geoid
* List of places on land with elevations below sea level
* Maxima and minima
* Summit (topography) (antonym)
* Topography

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