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Erosional landforms - Coggle Diagram
Erosional landforms
Bays and headlands
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All coastlines do not erode at the same pace. When a stretch of coastline is formed from different types of rock, headlands and bays can form.
Bands of soft, less-resistant, rock such as clay and sand are weaker therefore they can be eroded quickly. This process forms bays. A bay is an inlet of the sea where the land curves inwards, usually with a beach. Hard rock such as chalk is more resistant to the processes of erosion. When the softer rock is eroded inwards, the hard rock sticks out into the sea, forming a headland.
Erosional features such as wave-cut platforms and cliffs can be found on headlands, since they are more open to the waves. Bays are more sheltered with constructive waves which deposit sediment to form a beach.
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Blow holes
a blowhole or marine geyser is formed as sea caves grow landwards and upwards into vertical shafts and expose themselves towards the surface,
Blowholes are vertical faults which have been widened by wave attack. Headlands are made up of hard rock and bays formed where softer rock erodes away more quickly.
When sea caves grow towards the land and upwards creating a vertical shaft that exposed on the surface,
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Caves arches and stacks
Cracks are widened in the headland through the erosional processes of hydraulic action and abrasion.As the waves continue to grind away at the crack, it begins to open up to form a cave.
Caves, arches, stacks and stumps are erosional features found on a headland.
The cave becomes larger and eventually breaks through the headland to form an arch.The
base of the arch continually becomes wider through further erosion, until its roof becomes too heavy and collapses into the sea.This leaves a stack (a column of rock out on its own).The stack is undercut at the base until it collapses to form a stump
