The Electris deposits is 100-200 m thick deposit that is light-toned and appears to be weak because few boulders are seen associated with it. The deposit mostly covers ground from 30° S to 45° S and from 160° E to 200° E. So, some of it lies in the Phaethontis quadrangle and the rest in Eridania quadrangle. Recent work with HiRISE images lead scientists to believe that the deposit is an accumulation of loess that initially were produced from volcanic materials in Tharsis or other volcanic centers. Using a global climate model, a group of researchers headed by Laura Kerber found that the Electris deposits could have easily been formed from ash from the volcanoes Apollinaris Mons, Arsia Mons, and possibly Pavonis Mons.