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) refuge on Utopia, and participated in the fight against the attacking Nimrods. Erg is a mutant who is able to absorb all forms of energy and project them in blasts from his right eye, which he calls his "electric eye". Erg has appeared in a few episodes of the "X-Men: The Animated Series" with his fellow Morlocks and fought the X-Men. Erg (comics) Erg is a fictional mutant character appearing in American comic books published by Marvel Comics. Erg's first appearance was in "Power Pack" #12 (July 1985), and he was created by Louise Simonson and June Brigman. The character