Relatively rapid: Earthquakes, Landslides, Volcanic eruptions, Meteorites striking earth, Cooling Lava, Relatively slow: Weathering or Rock by Wind, Tree roots cracking rock, Erosion of a boulder to sand at the river's delta, Subduction of tectonic plates, Extremely slow: Sedimentation of layers, Cementation of particles (sediments), Uplifting of Mountain Ranges, Erosion of Mountain Ranges,

Geological Processes (time scale)

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恢復自動保存: ?