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The Formation of the Andes Mountains
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The Formation of the Andes Mountains
A Process of Subduction
The beautiful Andes!
In conclusion...
The Andes have a specific plate boundary interaction.
Normal subduction doesn't result in the same issues as the active boundary.
This abnormal subduction causes catastrophe and and sediment build up.
One huge earthquake was in 1994 in Boliva
Volcanoes Produced
It was an 8.2 magnitude
Aconcagua 6,962 meters
Ojos Del Saldo 6,891 meters
Monte Pissis 6,792 meters
(On the right)
The biggest earthquake ever recorded was also due to this boundary.
Valdivia earthquake topped at 9.5 in 1960.
A normal subduction
Here's a video of normal subduction
How this effects the environment
The area around the active boundary cracks and deforms.
There are many small earthquakes that get worse the closer you get to the trench.
Earthquakes can also be generated to depths greater than 600 km
How are the Andes different?
Let's watch this video!
http://www.geolsoc.org.uk/Plate-Tectonics/Chap3-Plate-Margins/Convergent/Oceanic-continental
How are mountains made?
Atacata Trench is deforming due to
pressure.
The Nazca plate is moving both
East and South into the
South American Plate.
The scraping of the plates causes build up and
friction between the two.
This can cause a lot of problems...
Mountains are formed over a period of time.
The crinkle extends both above and below the crust.
Mountains like those found in India are the oceanic crust gliding under the continental.