hogback

noun

Etymology: From hog + back.

1. A sharp steep-sided ridge formed by the erosion of tilting strata,

   “Without further parley Garland rode off up the hog's-back and the sheriff rode off down it …”

2. A hogframe.
3. A Viking grave marker taking the form of a recumbent monument, generally with a curved (hogbacked) ridge and outwardly curved sides.