Landforms of Coastal Deposition Flashcards

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Identify 3 landforms of coastal deposition.
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Beaches, sand dunes, spits and bars.

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Identify 3 landforms of coastal deposition.
Where do sandy beaches typically form?
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A sandy beach is usually formed in a sheltered bays, where low energy, constructive waves transport material onto the shore.

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Where do sandy beaches typically form?
What are ridges and runnels?
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Ridges are areas of the beach that are raised. The dips are water-filled troughs called runnels.

Ridge and runnels on Harlech beach, North Wales.

Ridge and runnels on Harlech beach, North Wales.

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What are ridges and runnels?
What is a bar?
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A bar is a ridge of sand or single that joins two headlands either side of a bay.

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What is a bar?
How are sand dunes formed?
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Onshore winds (winds blowing inland from the sea) cause the formation of sand dunes at the back of a beach. Sand is deposited by the wind around an object such as a rock, forming embryo dunes. Over time, vegetation such as marram grass stabilises the sand dunes forming foredunes. As the vegetation around the foredunes decomposes nutrients are released and soil begins to form. A wider range of plants are then able to colonise the dunes.

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How are sand dunes formed?




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