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01-Jan-2020 18:33

Sixteen years after his discovery, he published a geological map of England showing the rocks of different geologic time eras.

Methods for relative dating were developed when geology first emerged as a natural science in the 18th century.

These strata make up much of the famous prominent rock formations in widely spaced protected areas such as Capitol Reef National Park and Canyonlands National Park.

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.