Seismology is study of the generation, propagation and recording of the elastic waves and the source that produce them.... [Read More]

The earth is divided into three main layers: Inner core, outer core, mantle and crust.

The most important of cycles begin with molten magma from within the earth forming into rock, then continue with rocks being broken down into... [Read More]

Rocks are classified according to their place in the geologic cycle. The three major categories are