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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

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