Rock layer dating vh1dating com

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Relative dating does not provide actual numerical dates for the rocks.

Fossils are important for working out the relative ages of sedimentary rocks.

This interactive asks you to choose the best absolute dating method for each layer of rock in a cliff.A fossil will always be younger than fossils in the beds beneath it and this is called the principle of superposition.In an undisturbed sequence of rocks, such as in a cliff face, it is easy to get a rough idea of the ages of the individual strata – the oldest lies at the bottom and the youngest lies at the top.Ammonites, shelled relatives of today’s octopus, make ideal index fossils.Suppose a dinosaur fossil has been found in the beds of an ancient delta (the mouth of a river leading to the sea).

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