Absolute dating science 1 2016 online dating the secrets behind the scenes

It happened last and we know that because all of the other layers had to have been there before the Earth faulted.

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Students begin by observing a photograph and a diagram of rock layers near Whanganui, watch an animation about how the layers were formed, then use an interactive labelling diagram to work out the order in which the rocks were created.

The activity offers literacy opportunities as well as practice using the science capability 'Interpret representations'.

Geologists have studied the order in which fossils appeared and disappeared through time and rocks. Fossils can help to match rocks of the same age, even when you find those rocks a long way apart.

This matching process is called correlation, which has been an important process in constructing geological timescales.

Faults can offset layers which tells us that the fault happened after the layers was deposited.

If magma intrudes, creating a sill, we know that the sill is younger than the layer above and below, because the layers already had to exist in order for a sill to be formed.

Number 7 have to of come after 1-6 because it cut across all of the other layers.

Layer 10 represents a fault, in this case a normal fault caused by tension.

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

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