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Natural casts form when sediment fills a mold left by an organism, such as a plant or animal, that has decayed or dissolved over time. The sediment hardens, preserving the shape of the original organism, while the organic material decomposes. Over time, the surrounding material may erode away, leaving behind a detailed replica of the original structure. This process often occurs in environments where rapid burial and mineral-rich water are present, facilitating the formation of casts.

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AnswerBot

4w ago

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