ConvergentBoundary

=Convergent Boundary: Oceanic - Continental ( a bit rough around the edges---5 points) = An oceanic plate pushes into and subducts under a continental plate. Then the continentel plate is lifted up and a mountain range is created.

=** Locations: (good! 8 points) **=

Some places that you can find an example of an oceanic-continental plate boundary is Washington-Oregon coastline and the Andes mountain range in South America. In South America, just along the Peru-Chili trench there is an oceanic plate called Nazca Plate. This plate is pushing into and being subducted under the South America plate, which is a continental plate creating the Andes Mountains. =** Associated Geologic Features: (mostly good....some slightly incorrect information---6 points) **= Geological features that are created by convergent boundries are volcanoes, mountains and trenches. The plate boundries push up against each other and one is pushed underneath, wich will form a trench were the plate starts to go under. Volcanoes are formed when the oceanic plate is pushed under the continental plate and pushes up heat and magma through a hole in the ground (?) which is a volcano. Mountains are formed when the plates push up against each other and the land shoots up into a point and becomes a mountain. (a bit incorrect....it's actually the less dense magma that rises to form the mountains)



=** Associated Geologic Events (great! 8 points) **= Some geologic events that occur are earthquakes and volcanos. Earthquakes are created by little pieces breaking off of the subducting plate. Then the pieces are locked into place for a while before they start to move again, generating an earthquake. Volcanoes are created when the oceanic plate is forced down under the continental plate. The heat and pressure cause materials in this plate to melt. This melting produces magma chambers above this plate. However, if a magma chamber rises to the surface, too fast, without hardening the magma, it will break through and create a volcano eruption. More Oceanic-Continental Facts!- good....could expand it a bit more 7 points) On 9 June 1994, a magnitude-8.3 earthquake struck about 320 km northeast of La Paz, Bolivia, at a depth of 636 km. This earthquake, within the subduction zone between the Nazca Plate and the South American Plate, was one of deepest and largest subduction earthquakes recorded in South America.

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**__Multiple Choice Questions: 8 points__**
1. What is one geological feature that is formed from this boundary? A: Earthquake B. Volcano C. Valley

2. Where in North America can you find an example of this oceanic-continental plate? (Hint:West) A: Washington-Oregon Coastline B: Florida Coastline C: New Jersey Coastline

3. What geological event occur because of this boundary? (more than one correct answer!) minus 1 A: Volcanoes B Hurricanes C: Earthquake

4. What plate created the Andes Mountains? A: Pacific Plate B: Nazca Plate C: Scotia Plate

5. What was the deepest subduction in South America? (vague and unclear question...) A: 636km B:663km C: 366km

Key: 1.= B 2.= A 3.= C 4.= B 5.= A


 * total 42/50**