ASTR 111 Chapter Notes - Chapter 9: Basalt, Subduction, Seafloor Spreading
20 Oct 2017
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Document Summary
Planetary geology - extension of the study of the earth"s surface and interior to apply to other solid bodies in the solar system, such as terrestrial planets and jovian planet moons. Seismic waves - earthquake-induced vibrations that propagate through a planet. Core (of a planet) - dense central region of a planet that has undergone differentiation. Mantle (of a planet) - rockly layer that lies between a planet"s core and crust. Crust (of a planet) - low-density surface layer of a planet that has undergone differentiation. Differentiation - process by which gravity separates materials according to density, with high-density materials sinking and low-density materials rising. Geological activity - processes that change a planet"s surface long after formation, such. Magnetic field - region surrounding a magnet in which it can affect other magnets or the uppermost portion of the mantle as volcanism, tectonics, and erosion charged particles.
