How fossils are form. Determine tany two methods to know the age of fossil.
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Fossils are formed in a number of different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.
Two methods to determine the age of fossils:
When dug into the Earth, the fossils closer to the surface are more recent as compared to the fossils found in deeper layers.
The fossils can also be dated by detecting the ratios of different isotopes of the same element in the fossil material.
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