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EXTERNAL GEOLOGICAL AGENTS - Coggle Diagram
EXTERNAL GEOLOGICAL AGENTS
torrential waters
Definition: Water that circulates without a fixed channel
Torrents
They are sporadic courses with a fixed channel,
larger than wild waters.
Reliefs created by torrents
Gullies
Hole or concavity formed in the ground
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Mud avalanches
Which makes the land turn into a river of mud.
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Ravines
Deep, narrow valley with steep walls.
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Parts
Drainage channel
It transports the water and sediments.
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Dejection cone
Alluvial fan located at the foot of the mountainous massif, where the channel opens, loses speed and deposits its load.
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Reception basin
Especie de anfiteatro que alimenta el cauce principal, que se extiende lateralmente.
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Circumstances where they are generated:
-On terrain with steep slopes.
-When the rainfall is torrential.
-If the substrate consists of soft stones or deep soils. In the absence of vegetation that strengthens the soil.
-It is not generated in rainy environments, but in desert environments.
Wind
Definition: Current, hectic environment or circumstances that influence an established situation and can make it vary in some aspect.
Circumstances where they are generated:
Desert places with little vegetation and weak sediments.
Erosional processes
Abrasion
Suspended particles erode the rocks close to the surface
Landforms
Mushroom shaped rocks
Deflation
The wind removes fine, loose particles from the ground.
Landforms
Rocky deserts or paviments
Depositional processes
Wind reduces it speed and deposits sandy particles
Landforms
Dunes and dune fields. Sandy deserts or ergs.
The finest particles of dust Travel very long distances
Landforms
Loess
coastal water
As continental relief, the part that is emerged from the earth's surface with respect to sea level is called. Coastal lines are very dynamic things since they change continuously and in coastal landscapes the geological agent that intervenes is the movement of oceanic water.
Waves
They are crated by wind blowing the surface of the ocean. Waves strike the shore repeatedly and disintegrate the rocks mechanically.
Destructive waves
If the backwash is stronger than the swash, the dislodged particles are removed.
Erosion coastal relief
Cliffs
Constructve waves
If the swash is stronger than the backwash, deposition occurs.
Depositional coastal relief
Beaches
