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
What Love Is Made Of The song was ultimately excluded from Katy's second studio album, entitled "Little Red". During an interview with "Clash", Katy was asked about why she had not included the song in the album's track listing. To that question, she responded: "I just felt that I wanted to put some music out there, really. Like, 'Aaliyah' from "Danger EP" is on the album, but I loved collaborating with Jessie Ware. But ["What Love Is Made Of"] means a lot to me [too], so I wanted to get it out there, regardless of whether it was on the album." Having a length of