“…This is likely ascribed to the fact that these terrains are isolated from each other by large volumes of younger intrusions. These complexes have played an important role in elucidating details of the northern limits of the Arabian-Nubian Shield (Bentor, 1985;Stern and Manton, 1987;Kröner et al, 1990;Eyal et al, 1991), and permit correlation of tectonic elements between the North Eastern Desert of Egypt and the Midian Terrain of Saudi Arabia (Stern et al, 1984;Shimron, 1984b;Clark, 1985). This underlines the value of continued efforts to understand these complexes and the relations between them.…”