Relative dating interactive


22-Jun-2017 23:08

Next, oxygen deprivation, continued sediment accumulation, and the absence of extreme heat and pressure are needed in order to prevent the organism from being destroyed before it is fossilized.Most fossils occur beneath water because these conditions most commonly occur in and around water.Inclusions occur where a sedimentary rock forms around a foreign object.The foreign object is thus older than the sedimentary rock because it was there before the sediment that formed the rock.That is, they become abundant, and then their sensitivity to environmental changes causes them to become extinct.Index fossils are incredibly useful in relative dating.Relative dating is the process of establishing a sequence of historical events and relative ages of rocks by looking at sedimentary rock formations and their features.

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Effective index fossils have several characteristics—they are widespread, distinctive, abundant, and limited in geologic time.

This can be a challenging concept to understand, but if you imagine a basin where sediment is deposited, this principle states that the sediment will be equally deposited in this area until there is no more sediment or until the sediment reaches the edge of the basin or another barrier.



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