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Archaeological considerations[ edit ] Superposition in archaeology and especially in stratification use during excavation is slightly different as the processes involved in laying down archaeological strata are somewhat different from geological processes. It's called the Principle of Original Horizontality. He also found that certain animals were in only certain layers and that they were in the same layers all across England.
Learn how inclusions and unconformities can tell us stories about the geologic past. The occurrence of multiple inclusions within a single crystal is relatively common Melt inclusions are small parcels or "blobs" of molten rock that are trapped within crystals that grow in the magmas that form igneous rocks.
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