Convergent-+oceanic+to+oceanic

=Title:= Our group has convergent boundaries, oceanic to oceanic plates. We found out that they can form earthquakes, volcanoes and trenches. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form an island volcano. Such volcanoes are typically strung out into chains called island arcs. Volcano island arcs are usually curved. Magma that forms island arcs are produced by the partial melting of the descending plate and/or overlying oceanic lithosphere. The descending plate also provides a source of stress as the two plates interact, leading to frequent moderate to strong earthquakes. //Locations: //

Some locations that we found where this occurs is the Mariana Trench, Tonga Trench, Kuril Trench, Philippine Trench, Kermadec Trench, Izu-Bonin Trench, Japan Trench, Puerto Rico Trench, Peru-Chile Trench, and an unusually deep trench, the Challenger Deep. They are all located in the Pacific Ocean besides the Puerto Rico Trench, which is in the Atlantic Ocean.

**Associated Geologic Features:** What kinds of Geologic features are usually associated with your boundary? How were they made? Explain and use images, videos, etc to help Trenches, Volcanoes, earthquakes, Landslides sinkholes Tsunamis. They are some what made from the plates shifting.

=Associated Geologic Events= Plate Boundaries There are 3 primary types of Tectonic Covergent boundaries; and Transform boundaries. As these plates move, to converging which is coming together along the borders, huge energies are unleashed resulting in tremors that transform Earth’s surface.After all this stuff happens the plates appear to be moving at different relative speeds and are moving like a jigsaw puzzle of plates is connecting. No single plate can move without affecting others, and the activity of one can influence another thousands of miles away. For example, as the Atlantic Ocean grows under water with the spreading of the African Plate away from the South American Plate, the Pacific floor is being consumed in deep subduction trenches over 10 hundred to thousands of miles down.  =OTHER INTERESTING & ASSOCIATED CONTENT (CHANGE THIS TITLE)=

Oceanic crust- 10 kilometers, Generally 70 to 100 million years old, Basalt Convergent boundaries are also known as destructive plate boundaries.

Questions- 1. How big is the oceanic crust? A.5 kilometers B.25 kilometers C.10 kilometers D. 12 kilometers

2. What is NOT an example of an Oceanic-Oceanic convergent boundary? A. Mariana Trench B. Andes Mountains C. Challenger Deep D. Puerto Rico Trench

3. What kind of landforms do oceanic-ocean convergent boundaries form? A. Plains B. Delta C. Hurricanes D. Trenches

4. Convergent boundaries are known as _. A.Hard Plate Boundaries B.Soft Plate Boundaries C.Slow Moving Boundaries D.Destructive Plate Boundaries

5. In which oceans are these trenches, etc. formed? A. Pacific and Atlantic B. Pacific and Arctic C. Atlantic and Indian D. Indian