Grand Erg Oriental follow the wind's direction. There are other types of dunes, as well as "complex" dunes. Saharan winds are also known to clear an area of sand altogether, leaving bare rock (hamada) or gravel (reg). The "Grand Erg Oriental" is accessible overland by an Algerian road, which goes south from Constantine. It passes through the Aurès mountains, then salt lakes by the city of Biskra. Next the road skirts the western edge of the erg. After about 500 km. in all, it reaches the ancient oasis of Ourgla [Wargla]. Since late antiquity Wargla was a stop for the Saharan trade, being
Erg (comics) "The Uncanny X-Men" #487-491 (August–December 2007). Erg appeared as part of the "Morlocks" entry in the "Official Handbook of the Marvel Universe Deluxe Edition" #9. Erg was a member of the Morlocks, and was one of the few Morlocks to survive the Marauders' attack during the 'Mutant Massacre'. He was also one of the first mutants to seek a safe haven at the Xavier Institute following M-Day, when most mutants lost their powers. Erg, Mammomax, and Peepers were running from members of the murderous Sapien League. They had the institute in sight when they were taken down by a shock