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EXTERNAL GEOLOGICAL PROCESSES - Coggle Diagram
EXTERNAL GEOLOGICAL PROCESSES
WIND
Definitions of...
1-deflaction
A process that the wind detaches and removes loose particles from the surface of the Earth.
2-abrasion
AbrasiĆ³n is a process that the impact and friction of this materials on rocks polishes and wears away at them.
Depositional landforms
Dune
A mount of sand that has been transported by the wind
Loess
Extensive deposits of fine-grained particulate matter such as silt.
Erosiona landforms
Mushroom rocks
The wind shape isolated boulders, converting them into mushroom rocks
Honeycombs
When low density or heterogeneous rock is exposed to the impact of sand carried by the wind.
Desert pavement
Caused by the sweeping effect of deflatation on the dessert surface
Two conditions for erosion
Absence of vegetation
Present of loose materials
ICE
2 erosion processes
1-Plucking
Glaciers pulls out loose material and fragments rock.
2-Abrasion
The rock fragments stuck in the ice cut the walls and the floor.
Types of glaciers
1-Alpine glaciers
Found in mountains range at hight elevations
2-Continental glaciers
Cover enormous areas in polar regions
Glaciar landforms
U-shaped valley
Hanging valley
Lake
Horn
Arete
Definition of
Glacier
A thick mass of ice that moves over land
Iceberg
A large piece of ice they has broke off a glacier and fallen into a lake or the sea.
Depositional landforms
Depending on where the glacier deposits the material
Lateral morines
Medial moraines
Terminal moraines
Forms two ice tongues
Moraine: refer to the material that a glacier is carrying.
Parts of the ALPINE Glaciers
Cirque
Uppermost section
Terminal zone
The lowest section
Glacial valley
Channel where the ice descends
SEA
Two water movements causing EROSION
Waves
Tides
Landforms caused by erosion
Headlands and bays
Natural Bridges
Cliffs
Seastracks
2 methods for transport of eroded material
Waves
Longshore drift
Landforms caused by deposition
Lagoons
Spits
Deltas
Tombolos
Marshes