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
Erg Mountain Provincial Park Erg Mountain Provincial Park Erg Mountain Provincial Park is a provincial park in British Columbia, Canada. The park is spread over an area of 1011 hectares. In its interior parts, starting from the slopes of the valley above the Upper Fraser Trench, the park consists of cedar hemlock forests. From these forests the park continues on to higher altitudes, reaching the sub-alpine and alpine areas near the Erg Mountain. This mountain, which is an old hiking destination, is known for the magnificent vistas it offers of the Upper Fraser Valley along with the mountain range in the vicinity. When the