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Many of these organisms have left their remains as fossils in sedimentary rocks.
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.
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Fossils are important for working out the relative ages of sedimentary rocks.
Some of the worksheets displayed are Relative dating work, Relative dating ii, Sw science 10 unit 6 relative dating work, Biology relative dating work, Name relative dating work, Determining the age of rocks and fossils, Exercise 2 relative and absolute dating of geologic events, Relative dating lab.This matching process is called correlation, which has been an important process in constructing geological timescales.Some fossils, called index fossils, are particularly useful in correlating rocks.Bring relative dating principles to life with the activity Rock layers and relative dating.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.
In this lab, you will apply many of these laws and principles to determine the relative sequence of geologic events that created a particular set of rock layers and intrusions.