Basins

Named closed depressions, sedimentary basins, hollows and glacial cirques, following the structural, sedimentary and glacial basin classes of standard geology and geomorphology. Includes tectonic sedimentary basins formed by rifting or subsidence (Northern North Sea Basin, Ellisras Basin, Gulf of Corinth Basin, Pearl River Mouth Basin), erosional crater-like depressions of the makhtesh type (Makhtesh Ramon, HaMakhtesh HaKatan), other named closed hollows and depressions (Rainbow Basin, Devil's Punch Bowl, Devil's Beef Tub, Minusinsk Hollow, Kallang Basin, Hoya of Guadix), and glacial cirques and high basins (Sniezne Kotly, Snow Lake). Belongs here: any entity whose own defining identity is a named, roughly enclosed low-lying or bowl-shaped feature. Does not belong here: a broad, open river or glacial valley (this atlas's own Valleys subcategory), or the generic concept of a basin or depression described in the abstract rather than as a named place (Landform Concepts).