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Relative dating of rock

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deposition has been occurring on earth for a very long time.

as time goes by, more deposits form layers on the earth, including the remains of animals and plants that would later become fossils, burying the previous deposits in another layer of newer deposits.

The Grand Canyon acts as a modern testament to stratigraphy and relative dating.The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth can be an interesting study for students of all ages.Teaching about Earth's history is a challenge for all teachers.So, let's imagine for a second that you have a 3-layered cake. So, by definition, the oldest layer of cake would be chocolate, as it was put there first. Now all of a sudden the big tower of cookies running through the middle of your cake is the youngest feature, as the other three layers in order for it to be there.Your 3 layers will consist of a chocolate cake, a vanilla cake, and a cheesecake, because you're crazy and your cake doesn't have to conform to standards. On your plate, you put the chocolate cake on bottom, or the first layer. Then vanilla and cheesecake are the second and third oldest, respectively. Now that I've gotten you all hungry for cake and cookies let's talk about rocks instead.Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata.