What Causes an Ocean Trench to Form?

Answer

An ocean trench is a narrow topographic depression that is found in the ocean. Trenches are formed when two tectonic plates come together and the densest sinks below the other plate. The deep line that is formed as a result is an oceanic trench and it could extend for hundred of kilometres.
Q&A Related to "What Causes an Ocean Trench to Form"
Answer Deep ocean trenches are made where one plate is submerged under another
http://wiki.answers.com/Q/Deep-ocean+trenches+are+...
Water covers more than two-thirds of the surface of Earth. The average depth of the oceans measures about 4 km, but the trenches, appearing as long, vast chasms dug into the surface
http://www.ehow.com/info_8711627_ocean-trenches.ht...
The oceans formed on Earth 3.8 billion years ago. At this time the Solar System was
http://www.chacha.com/question/what-causes-oceans-...
Salt is the mineral halite or rock salt. The mineral has the chemical composition of sodium chloride, or NaCl. Salt is a very soft mineral that forms as single or intertwined cubes.
http://www.ehow.com/info_8084452_causes-salt-cryst...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com