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the concept that earth was shaped by catastrophic events of a short-term nature
principle that Earth's processes occurring today are similar to those that occurred in the past
Decayed remains of once living creatures
inorganic crystalline substances found naturally in the earth
the process that crumbles, cracks, and breaks rocks slow change by wind and water
The process by which wind, water, ice, or gravity transports soil and sediment from one location to another
where there is gap in the rock layers
rock formed from cooled magma or lava
A type of rock formed from either sediments or igneous rocks