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
Influence of Arabic on other languages Examples are "information" to mean the imparting or acquisition of knowledge (Arabic "taṣawwur", mental impression or representation, from a root meaning "form") and "intention" (Arabic "manā", meaning). These words may almost be regarded as calques. French is widely spoken as a second language in France's former colonies in the Maghreb. Therefore, the list of words that are used or incorporated into the French spoken in this region (as a result of code-switching, convenience or lack of an equivalent term in standard French) is potentially endless. Such arabisms, are accepted within the local context but would not normally be known by