convexité de terrain

CONT: Des avalanches, dont les cassures linéaires atteignent jusqu'à 50 cm de profondeur, ont été déclenchées par des skieurs sur des petites convexités de terrain. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.]
OBS: convexité de terrain; zone convexe : termes uniformisés par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.

CONT: Avalanches were released by skiers on small convex rolls with crown fractures up to 50 cm deep. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.]
OBS: A ""convex roll"" is a terrain feature with a convex shape to it. Often referred to as a ""roll"" because due to the shape of a convexity, when you come upon a feature like this, the terrain begins to ""roll away"" as you progress down the convexity. [Reference: Grant Statham, Avalanche Specialist, Parks Canada.]
OBS: convex roll: term officially approved by the Avalanche Bulletin Terminology Standardization Committee.