tension fault[′ten·chən ‚fȯlt]
a fracture in the earth’s crust caused by tension; the rocks that are separated simply move apart and experience no other relative displacement. The fissure formed by a tension fault either remains gaping or fills with mineral material that has risen from the depths or been precipitated from water solutions. The largest genuine tension fault is the Great Dyke of Rhodesia, which is filled with cooled magma. It reaches 10 km in width and is more than 500 km in length.