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sedimentary rock
solar energy and gravity drive the process of sedimentary rock formation
loose clasts (sand/grain/fragments) are cemented together
sediment
moving material from erosion by gravity, water, wind, and ice through landscapes
lithification
occurs as loose sediment is hardened into solid rock
limestone
most common chemical sedimentary rock
seismic waves
shock waves that travel throughout the planet
core
two regions (inner & outer)
divided by a transition zone several kilometers wide
mantle
rich in iron and magnesium oxides in silicates, which are dense and tightly