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Julia Y

on 20 November 2012

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Transcript of COLLISION ZONE

Explain what is going on at
the boundary. What actually happens in collision zones? How does it happen? What are the causes? How collision zones look. We will provide a diagram to help you visually understand how collision zones look like! Today we will be talking
about: What landform features are
associated with this type
of boundary. Are there mountains, trenches or other significant geological features involved? Where on Earth are they found? We will provide examples of where collision plates can be found. What type of earthquakes
are associated with
collision zones? Volcanoes? Are the earthquakes deep or shallow? What about volcanoes - are they composate, for example? By Ana, Hari, Julia, Yaying COLLISION ZONES Collision Zone Diagram They say that collision zones are
basically a variation of subduction zones.
The subduction zone is destroyed (by the
two plates colliding into each other), and
the force begins to produce what will become
a fold mountain. Finally, the mountain is
formed. How collision zones work! We will need two
volunteers for this
next demonstration! Hills and Mountains Volcanoes Landform features that are
associated with collision zones Continental plates have
the same level of density.
That means when two
continental plates collide,
they push against each
other until the crust in
between the too plates is
forced up. This forms
mountains and hills. Where do we find them on Earth? Himalayas
Where the Indian plate meets the
Eurasian Plate! Andes
Where the Nazca plate meets the
South American plate! Sumatra Mountain range - Indonesian
Where the Australian plate and
the Eurasian plate meet! What type of earthquakes are associated with collision zones? 2. Broad zones 3. Seismic activity 1. Shallow earthquakes What type of
volcanoes are associated
with collision zones? When the two plates are pushing against each other you can imagine there is a huge amount of pressure in between the two plates, which causes a lot of heat. So often magma gathers and is pushed up along with the crust, forming a volcano. - Volcanoes are rarely formed
on collision zones but are created when there is a crack between the two continents that are colliding
- Ex. Himalayas mainly consists of
mountains but the melting crust
which is forced into the mantle
by the collision can cause volcanic
- These volcanoes referred to as "fold
volcanoes" or "collision volcanoes" Convection currents gas or liquid created by uneven
heating) push two continental
plates into one another (circular movement in a The earth quakes are destructive quakes,
due to the massive compressive forces,
developing thrust faults and lack of bedrock
to absorb shocks. "Continental collision zones occur when two plates containing large areas of continental crust are pushed together. As the continental areas converge, the oceanic crust between them is consumed by subduction until the continental areas collide."
http://www.classroomatsea.net Conclusion Collision zones are the reason we have these beautiful mountains and hills today. They're still happening, even right now, and they will continue to collide for a very long time.
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