Phytogenic hillocks are landforms typical for areas built of blown sands. They are an effect of cooperation of wind with bushy vegetation of specific features. One of such areas is located in Silesian Upland in southern Poland (so-called Bledow
as by natural vegetation expansion and succession. One of species intensively entering into this area is Salix arenaria. And just at participation of this bushy willow in deflation areas very characteristic phytogenic hillocks of heights reaching up to 1,5 m
are here created using more humid clayey insertions of substratum. In area discussed it is possible to observe different development stages of phytogenic hillocks : from initial through mature to disappearing ones. The age of hills was determined
on the base of dendrochronological analysis. These hills have different shapes and heights, which are conditioned by the intensity of aeolian processes. It is possible to state that phytogenic hillocks of so-called Bledow Desert are created by natural
The enigmatic DeKalbmounds in north-central Illinois, United States, are oval, inactive hillocks of Wisconsinan age. Different origins have been proposed for the DeKalb mound fied but the only previous in-depth study identified them as pingo
complex of the Ragnarbreen revealed patterns in the morphology such as the lineation of hillocks and depressions, parallel to the edge of the moraine complex.