Class 9b: Coastal landforms and rivers

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Class 9b Coastal landforms and rivers
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Ocean erosion
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Coastal landforms from erosion

• On newer, more rugged coastlines

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Ocean transport

• Longshore currents waves not parallel to shore

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Ocean deposition

• Beaches!

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Coastal deposition

• On coastlines already worn down

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Coastal deposition
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Stabilizing the coast

• Harbors or bays may close over, cliffs may fall

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Stabilizing the coast

• Unintended consequences

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Coral reefs

• The only organic landform

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Coral reefs
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Coral reefs

• Absorb energy from waves and protect shores

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Fluvial basics

• Fluvial processes involving running water

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Fluvial basics

• Watershed all the land that drains into a stream

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Fluvial erosion

• Amount of erosion depends on
• Speed of river
• Degree of turbulence
• Type of bedrock

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Fluvial transport

• Material carried by a stream is the stream load
• Bed load, dissolved load, or suspended load

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Fluvial deposition

• Found all along rivers especially at mouth