Coastal Depositional Landforms 0.0 / 5 ? GeographyCoastal environmentsASWJEC Created by: Oreo CostaCreated on: 12-02-18 20:20 What are beaches mainly composed of? Loose, unconsolidated sands & pebbles. 1 of 17 How do beaches survive rough storms and energetic wave conditions? They have an ability & mobility to adjust their dynamic equilibrium to many different conditions. 2 of 17 What is a 'swash-aligned beach'? Where waves break parallel to the shore, with little longshore drift. 3 of 17 What is a 'drift-aligned beach'? Where waves arrive at an oblique angle & considerable longshore drift occurs. Plenty of sediment available. 4 of 17 What is a 'zeta-formed beach'? Headlands & refraction stop longshore drift - build up of sediment in front of headland. 5 of 17 What is a 'spit'? A linear deposit of sand & shingle attached to the land at the proximal end but free at the distal end. 6 of 17 Where can spits be found? At low energy envmts, where longshore drift is active and the coast has an abrupt change of direction. 7 of 17 What other landforms can spits form? Bars & coastal lagoons. Over time, the sheltered area behind a spit can also become a mud flat or salt marsh. 8 of 17 What is an example of a spit? Spurn Head in Yorkshire. 9 of 17 What are 'cuspate forelands'? Triangular shaped projections with an apex pointing out to the sea. 10 of 17 Where is an example of a cuspate foreland? Dungeness. Formed by 2 opposing directions of swell & longshore drift. 11 of 17 How are cuspate forelands formed? Sediment from longshore drift is trapped when an equilibrium is reached between sediment inputs & energy available to move it. 12 of 17 How are tombolos formed? Longshore drift joins an island onto either the mainland or to a larger island. 13 of 17 Name an example of a tombolo 'Tombolo di Orbetello' in Tuscany formed where 2 sand spits joined the former 'Monte Argentano Island' onto the mainland forming a large lagoon. 14 of 17 What are 'bars & barrier islands'? Elongated deposits of sand & shingle parallel to the coastline. 15 of 17 How are bars & barrier islands formed? By constructive waves. 16 of 17 Where are bars & barrier islands found? In seas with shallow offshore gradients & a low tidal range, yet relatively high wave energy. 17 of 17
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