Definitions for "Graben"
An area between two parallel faults that is lower than that on the other side of the faults.
A downthrown block between two normal faults of parallel strike but converging dips; hence a tensional feature.
trench like depression representing the surface of a crustal block dropped down between two opposed blocks
Keywords:  greensands
a ditch, so it is essentially a culinary divide that keeps the two sides apart