In locations around the world, ocean crust subducts, or slides under, other pieces of Earth's crust. The boundary where the two plates meet is called a convergent boundary. Deep trenches appear at ...

than the ocean floor. When two land masses meet, on the other hand, neither will slide under the other. Instead, the two crush together at what is known as a collisional boundary. They crumple and ...

if they can demonstrate that their continental shelf extends beyond the 200 nautical mile boundary consistent with the provisions of the Convention. The Faroes/Denmark are among the countries that ...