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) mutants that the tags were "...a harmless tracking device, inserted under the skin with a simple and painless surgical process." That was not true, as Erg later discovered, as the tags had the ability to generate disabling electronic pulses. Later, Mister M freed the chipped mutants of their devices. During "The Extremists" arc, Erg reappeared alongside some of his fellow Morlocks under the leadership of Masque. Besides Erg, this group consisted of Bliss, Litterbug, the undercover Skids, and the captured Leech. Erg is shown as one of Norman Osborn's mutant prisoners after the riots in San Francisco. He later took