羊よう背はい岩がん

noun

roche moutonnée; sheepback

A glacially eroded rock formation with a smooth, rounded upstream side and a rough, plucked downstream side, resembling a sheep's back. Technical term used in geology.

• 氷ひょう河が地ち形けいの一ひとつとして、羊よう背はい岩がんが観かん察さつされた。

  Roches moutonnées were observed as one of the glacial landforms.