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In arid regions, a basin filled with alluvium and intermittent playa lakes and having no outlet.
(Spanish for purse) refers to the basin area in basin and range.
An alluvium-floored basin, depression, or wide valley, mostly surrounded by mountains and drained by a system that has no surface outlet. Bolson fill is the alluvial detritus that fills a bolson--also commonly called bolson deposits.
A topographically enclosed depression or basin that has no stream outlet
Is a closed desert basin with no drainage outlet, surrounded by mountains.
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