Closed depressions in Central Poland are different origin. Two main groups are anthropogenic and natural forms. Many genetic types of the latter can be indentified, e.g.: l. blow-outs accompanying dunes and their complexes; ...

Basic surface features of the Łask Interfluve near Zduńska Wola originated during the Wartanian ice-sheet areal deglaciation. The ice-sheet waning resulted in formation of groups of crevasse landforms such as kame plateaux, ...

The calcareous deposits in the upper part of Quaternary-age sediments were found in the Bełchatów mine. These deposits were accumulated in closed depressions. AIl these depressions are located in Świętojanka valley and ...