The document discusses trenches in the ocean. Trenches form at subduction zones where tectonic plates meet and one slides under the other. The deepest known point on Earth is located in the Mariana Trench, which reaches depths of over 10,000 meters. In 2009, an underwater robot called Nereus dove to the bottom of the Mariana Trench to study and explore the deepest part of the ocean floor. Trenches can form when one tectonic plate overrides another but is later overridden itself in a process known as trench flipping. Resources like metals and oil can accumulate in trenches over time.

1. Trenches By: Asa Kramer-Dickie Kramer-dickiea.pptx

2. What is a trench? A trench is a deep Sea crevice or pit Trenches occur at subduction zones http://geology.com/press-release/deepest-part-of-the-ocean/ http://blue.utb.edu/paullgj/physci1417/Lectures/Conv_Cont_Ocean.JPG

3. The Mariana Trench This is the deepest part of the ocean ever recorded The deepest part in this trench is called challenger deep http://geology.com/press-release/deepest-part-of-the-ocean/ http://blogs.smithsonianmag.com/science/files/2009/01/chimneys_hirez.jpg

4. Nereus This is an oceanic robot that was sent down to challenger deep Nereus dove 10,902 meters on may 31, 2009 http://geology.com/press-release/deepest-part-of-the-ocean/

5. Trench Flipping When two plates subduct and one can’t fit the previously overriding plate will dive under the lower plate http://platetectonics.com/book/page_12.asp

6. How It Affects My Life Lots of metal has been deposited in trenches Scientists have also found oil at the bottom of trenches Holden, john. Earth in motion. New York, NY: William morrow and company, 1978 http://www.wired.com/images_blogs/photos/uncategorized/2007/05/01/oil.jpg , 1978

7. THANK YOU FOR WATCHING! Kramer-dickiea.pptx THANK YOU FOR WATCHING! THANK YOU FOR WATCHING!