Issaouane Erg confined to basins. Sand in the Issaouane Erg, below the level of the sand dunes, has accumulated to a depth of 20 to 30 meters. It has barchan dunes as well as star dunes of 300 to 430 meters high. The presence of both barchan dunes (which form due to unidirectional winds) and star dunes (which form when winds from various directions deposit sand) "suggests that wind regimes have changed over time". NASA's "Earth Observatory" notes all three types of erg dunes are present in the photos of the Issaouane Erg taken from the International Space Station: stationary mega dunes,
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