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 Katy released her debut album, entitled "On a Mission", by Rinse and Columbia Records. Exploring dubstep-based musical genres, it garnered critical praise, including being nominated for the Mercury Prize. In the UK, it was a commercial success, peaking at number 2 in the UK. Following that release, was the extended play (EP) "Danger", which was available online in December 2012. During an interview with "Billboard" held in March 2013, Katy revealed that her sophomore studio album was nearly done. Katy revealed to MTV UK website District MTV that she felt inspired to record "What Love Is Made Of" by hearing