Wadi - Dry watercourse in a deep narrow valley that devides a plateau, Alluvial fan - Semicircular build up of eroded material deposited by water and wind at the end of a wadi, Barchan dune - Cresent shaped dunes formed by the wind blowing from one direction., Butte - Isolated steep, flat topped hill. , Mountain - Steep-sided, lone peak rising above surrounding land, Fold mountains - Formed when two tectonic plates collide and the crust folds. , Glacier - River of ice that moves downhill. , River - A natural waterway that carries water downhill., Floodplain - Flat land that water spills onto in flood conditions., Meander - Loops in a river., Delta - Sediment at a river's mouth. The river splits at a number of finer channels to find its way to the sea. , Headland - Land jutting out to sea formed of harder rock that resists erosion, Bay - Curved indentation in the coastline., Beach - Deposited particles along the coastline., Coastal dune - Mound of wind-blown sand at the back of the beach.,

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