a relatively long, narrow area of the earth's crust that has subsided between two bordering faults
Origin of grabenGer, a ditch ; from Old High German grabo ; from graban, to dig: see grave
A usually elongated depression between geologic faults.
Origin of grabenGerman Graben, from Middle High German grabe, trench, from Old High German grabo, from graban, to dig; see ghrebh-2 in Indo-European roots.
(plural grabens or graben)