Most of what we know about the inner structure of the Earth comes from seismic waves ... However, progress has sped up, and geologists now think they are composed of relatively dense oceanic crust ...

Deep beneath Earth’s surface, researchers have discovered an ancient seafloor buried for millions of years. This unexpected ...

Deep within Earth’s mantle lie two enormous, continent-sized structures known as LLVPs. Scientists once believed these ...

And like an eggshell, the crust has cracked and split into many different pieces called tectonic plates. These plates can be oceanic, meaning they're found mainly under the ocean, or continental ...

The plate boundary forms a thick duplex structure, within which crustal rocks are imbricated ... occur beneath the top of the subducting oceanic crust where it dips most steeply. As the top of the ...

The diagram below shows the structure of the earth ... Continental and oceanic plates all fit together to form the outer crust of the planet. Eight major plates are named on the diagram below.