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Features of Deposition - Coggle Diagram
Features of Deposition
Beaches
Beaches form when eroded material, called sediment, is transported to a sheltered area, such as a bay, deposited by constructive waves.
Beaches are dynamic landforms shaped over millennia. They can vary greatly in color and composition due to local rocks, shells, or volcanic materials
Beaches form when eroded material, called sediment, is transported to a sheltered area, such as a bay, deposited by constructive waves.
Examples of Local Beaches
Broadsands beach in South Devon.
Fishcombe beach in Brixham, Devon
Goodrington in Paignton, Devon
Salt Marshes
Plant succession- Salt-tolerant plants such as sea lavender colonise and form a saltmarsh Carbon sinks Biodiversity Mud flats: Bird feeding grounds Invertebrates richness Unvegetated sediment
Morecambe Bay in north-west England, is a key uk example of a mudflat due to its vast, continuous intertidal mudflats and sandflats, which are crucial habitats for rich infaunal communities and wintering birds. A highly-regarded example in the UK of a salt marsh- tiffkey Marshes in North Norfolk for its vast, unspoiled scenery and wildlife.
Mudflats are formed from the accumulation of fine sediments building up and creating them. Salt marshes are formed form salt water moving over the empty mudlfats then receding and leaving behind sediment and nutrients. They are formed in sheltered areas.
Salt marshes are coastal wetlands dominated by salt-tolerant plants - found in sheltered areas and behind natural barriers Mud flats are exposed areas of fine and unconsolidated mud found a low tide - found in sheltered areas and natural harbours.
Sand Dunes
Place specific examples:
Braunton burrows, devon, Barry links, scotland, Sands of, forvie, scotland, Carmarthen bay, wales
Key facts?
Since 1900, the UK’s sand dunes have declined by a third, and almost two-thirds in Wales.
Sand dunes are habitats crucial for rare species
What is this feature?
Sand dunes are hills or ridges of wind or water driven sand
How is it formed?
Sand dunes form when onshore winds blow dry beach sand, which is first deposited by waves, onto the beach where it gets trapped by natural obstacles or plants.
Bars
Bars form from the process of coastal deposition, where longshore drift transports sediment along a coastline
The material is pushed onto the beach at a 45 degree angle when the swash brings it onto the coastline
The backwash then takes it back out towards the sea at a right angle (90*).
A coastal landform created by deposition of sediment (sand or shingle) across the mouth of a bay or a river parallel to the coast. It is created when there is a gap in the coastland with water in it. This could be a bay or natural hollow in the coastland.It occurs form longshore drift.
An example of a bar is Chesil Beach, near portland, in dorset. Chesil beach is separated from the mainland by the fleet lagoon.
Spits
A spit is formed when longshore drift occurs, this happens when longshore drift carries sediment along the coastline and it extends out into the sea and bends.
A spit is a small, narrow, elongated landform that projects out into a body of water, usually from a beach or coastline.
A spit is a depositional landform—a long, narrow stretch of sand or shingle connected to the mainland at one end and jutting into the sea at the other.
Dawlish Warren is a sand and shingle spit formed by longshore drift at the mouth of the River Exe on Devon’s south coast.
Tombolos
Place specific example: Chesil Beach in Dorset St Michaels Mount, Cornwall St Ninian's Isle in southwest Shetland —the UK's largest sandy tombolo—
How is it formed?
Tombolos form when a spit of deposited sand and gravel extends from the mainland to an island, or when waves diffract and deposit sediment between an island and the mainland
What is this feature?
Its key features are its formation through wave refraction and longshore drift around a coastal island, its function as a barrier that can enclose a lagoon, and the island it connects becoming known as a "tied island"
Key facts?
A tombolo is a depositional landform where a narrow strip of sand or shingle, known as a spit or bar, connects an island to the mainland, forming a "tied island”