scarpment

It has a Dyke, or scarpment, running round it, like a collar, and was probably a British or Danish encampment; geologically it consists of ironstone, quite distinct from the sandstone formation on the lower ground.

Records of Woodhall Spa and Neighbourhood Historical, Anecdotal, Physiographical, and Archaeological, with Other Matter James Conway Walter

The steep front of the wreath came down within half-a-dozen paces of the fire where Lucien was seated; and it was upon the top or scarpment of it that the object appeared that had drawn his attention.

Popular Adventure Tales Mayne Reid 1850

The steep front of the wreath came down within half-a-dozen paces of the fire where Lucien was seated; and it was upon the top or scarpment of it that the object appeared that had drawn his attention.

The Young Voyageurs Boy Hunters in the North Mayne Reid 1850