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| when trees sap hardens it becomes amber |
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| The trace or remains of an organism that lived long ago |
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| A mixture of dark bituminous pitch with sand or gravel |
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| Filling or replacement of an organism's tissues with minerals that have different cheimacal compositions that the original tissues did. |
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| Any fossilized evidence of animal activity |
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| The impression left in sediment or in rock where a plant or animal was buried |
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| An object that forms when sediment fills a mold and becomes rock |
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| The history of life in the geologic past as indicated by the traces or remains of living things |
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| The impression left in sediment or in rock where a plant or animal was buried |
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| An object that forms when sediment fills a mold and becomes rock |
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| The histroy of life in the geologic past as indicated by the traces or remains of living things |
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| fossils of organisms that lived during a relatively short, well-defined geoligic time span |
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| The theory that explains how earth's tectonic plates move and change shape |
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