<Dd> Agricultural land that is plowed or tilled but left unseeded during a growing season . Fallowing is usually done to conserve moisture . </Dd> <Dd> A fracture in the Earth's crust accompanied by a displacement of one side of the fracture . </Dd> <Dt> fault - block mountain </Dt> <Dd> A mountain mass created by either the uplift of land between faults or the subsidence of land outside the faults . </Dd>

What do geographers call a name given to a portion of the earth’s surface