roches moutonnées

from The Century Dictionary.

• noun Scattered knobs of rock rounded and smoothed by glacial action: fancifully so called from their resemblance, as seen rising here and there or in groups above a surface, to a flock of sheep lying down: sometimes Englished as “sheep-backs.”

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Plural form of roche moutonnée.