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Carbon dating age of rock

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A layer that is higher is of later age than a layer that is lower in order.This means that the oldest are the strata that are lying at the bottom.It is possible to tell the number of years ago a particular rock or archeological site had been formed.Two broad categories of classification methods are relative dating and absolute dating.However, archeologists still require further information to find out the items that are oldest and those that are youngest in the order.It is left for absolute dating to come up with the precise age of an artifact.Radioactive elements, either of natural origin or created by nuclear testing, can be used to date the layers of ice.Some volcanic events that were sufficiently powerful to send material around the globe have left a signature in many different cores that can be used to synchronise their time scales.

It implies that relative dating cannot say conclusively about the true age of an artifact.

Cores are drilled with hand augers (for shallow holes) or powered drills; they can reach depths of over two miles (3.2 km), and contain ice up to 800,000 years old.

The physical properties of the ice and of material trapped in it can be used to reconstruct the climate over the age range of the core.

However, age of deposition does not mean the age of artifacts found in that layer.

Artifacts found in a layer can be compared with other items found in layers of similar age and placed in order.