Two types of relative dating


17-Dec-2015 10:46

For instance, if we find a fossil bone below the strata 3 rock level shown above, we assume that the animal most likely lived at a time before that layer was formed.However, we must be careful to note whether or not the fossil comes from the mixed strata zone of the filled in hole..In other words, they may no longer be in their primary context.When the bones of our early ancestors are found in the same geological strata as those of other animals that are known to have lived only during a specific time period in the past, we assume that these ancestors must also have come from that time.In the past, relative dating methods often were the only ones available to paleoanthropologists.As a result, it was difficult to chronologically compare fossils from different parts of the world.These processes result in All of these processes confuse the stratigraphic record.

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This is referred to as dating by association with they underwent relatively rapid evolutionary changes that are identifiable in their teeth and other skeletal parts.Their bones also were frequently found in association with our human and primate ancestors.