Erg Chebbi (Berber: ⴻⵔⴳ ⵛⴱⵉ, Arabic: عرق الشبي) is one of Morocco's several ergs – large seas of dunes formed by wind-blown sand. There are several other ergs such as Erg Chigaga near M'hamid. Technically all these ergs are within an area of semi-arid Pre-Saharan Steppes and not part of the Sahara desert which lies some distance to the south.