ClipArt ETC
Devil's Wall (Teufelsmauer) near Oschitz, Bohemia. A basaltic dike.

Devil's Wall

Devil's Wall (Teufelsmauer) near Oschitz, Bohemia. A basaltic dike.

"F. Wall of sheet-piling at Havre, France, with earth embankment behind the piles." -Whitney, 1911

Sheet Piling

"F. Wall of sheet-piling at Havre, France, with earth embankment behind the piles." -Whitney, 1911

"E. Dutch polder-bank, consisting of sheet-piling with earth filling, and an apron of rubble on the side toward the sea." -Whitney, 1911

Polder

"E. Dutch polder-bank, consisting of sheet-piling with earth filling, and an apron of rubble on the…