Coastal landforms Flashcards

1
Q

Headland erosion

A
Headland eroded by natural processes
Forms fissure known as geo
Geo expand can into blowhole
Geo can expand into cave
Cave breaks down into arch
Arch breaks down to stack
Stack breaks down to stump
Sediment forms wave cut platform
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2
Q

Beaches

A

Commonly found in bays
Depositional landform
Made of sand or shingle
Swash aligned or drift aligned

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3
Q

Storm beach

A

A ridge marking the level at which pebbles are pushed to during highest spring tides

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4
Q

Beach cusp

A

Crescent shaped augments on shingle ridges

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5
Q

Berms

A

Lower ridges parallel to the storm beach
Mark successive levels
Shows where material gets pushed to during storms at high tide

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6
Q

Spit

A

LSD deposits sediment at a break in coast
More deposition forms bigger spit
Changed wind direction form recurved end
Salt marsh forms behind spit

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7
Q

Swash aligned beach

A

Closed system

Unaffected by LSD

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8
Q

Drift aligned beach

A

Open system
Affected by LSD
Can form spits, bars, tombolos

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9
Q

Tombolo

A

Spit that connects island with mainland

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10
Q

Coastal bar

A

Spit that connects back up with mainland

Eg. forms across bay, saltmarsh forms in bay

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11
Q

Depositional landforms

A
Beach cusps
Storm beach
Berms
Bars
Spits
Tombolos
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12
Q

Erosional landforms

A
Bays
Headlands
Geos
Blowholes
Caves
Arches
Stacks
Stumps
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13
Q

Sand dunes

A
Example of succession
Psamuosere
Pioneer species marram grass
Embryo dune grows to foredune
Foredune grows to yellow dune
Yellow dune grows to grey dune
Can have dune slack after grey dune
Mature dune grows from yellow dune
Need large supply of sand and prevailing winds
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