butte cryogène

OBS: Les divers types de buttes (p. ex. buttes saisonnières à noyau de glace, dômes de glaçage, palses et pingos) se distinguent par leur structure, par la durée et par la nature de la glace qu'elles contiennent.

CONT: On the basis of genetic processes, frost mounds can be subdivided into two general categories: (1) seasonal frost mounds, which develop during a single winter season, and (2) perennial frost mounds, which include mounds formed by growth processes acting over periods of several decades or centuries ...