Dowoo - a new type of earth mounds in continental permąfrost domain (Central Mongolia)
DOI:
https://doi.org/10.26485/BP/1986/30/9Keywords:
permafrost structures, rampart form, alluvial fans, pressure of waterAbstract
In the outlet of dells to the zone of alluvial fans of different age occurring in the vicinity of Chojor Nuur (Central Mongolia), the rampart forms and mounds reminding pingo with its appearance, have been discovered in spring seasons of the years 1976-1978. They were formed on the turn of April and May as a result of accumulation and compression under the permafrost or within its subterranean waters. The pressure up to the surface of waters, which were under the high hydrostatic pressure gave rise to the development of positive landforms. The decay of the mounds and the rampart followed fast. It was caused by the outflow of the water on to the surface, resulting from the up break of permafrost mantle which is already thin in June or at the beginning of July. The forms not yet revealed, by that time have been named dowoo which means a mound in Mongolian.
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