6 relative dating laws

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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'.

Correlation with them has helped geologists date many New Zealand rocks, including those containing dinosaurs.

Bring relative dating principles to life with the activity Rock layers and relative dating.

Throughout the history of life, different organisms have appeared, flourished and become extinct.

Many of these organisms have left their remains as fossils in sedimentary rocks.

We'll even visit the Grand Canyon to solve the mystery of the Great Unconformity!

These techniques were first articulated by Nicolas Steno, a Dane living in the Medici court of Italy in the 17th C.As a member, you'll also get unlimited access to over 79,000 lessons in math, English, science, history, and more.Plus, get practice tests, quizzes, and personalized coaching to help you succeed.Some fossils, called index fossils, are particularly useful in correlating rocks.For a fossil to be a good index fossil, it needs to have lived during one specific time period, be easy to identify and have been abundant and found in many places. If you find ammonites in a rock in the South Island and also in a rock in the North Island, you can say that both rocks are Mesozoic.

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