S cientists have found remnants of an ancient seabed beneath the Nazca Plate. The discovery, described in the journal ...

And like an eggshell, the crust has cracked and split into many different pieces called tectonic plates. These plates can be oceanic ... a convergent plate boundary. As the Nazca Plate collides ...

The oceanic rocks are usually made from basalt, while continental rocks are made from granite. Continental and oceanic plates all fit together to form the outer crust ... Nazca and South American ...