Relative age dating diagrams 3 amazing dating tips

10-Jun-2016 10:13

Principles of Stratigraphy Stratigraphy is the study of strata (sedimentary layers) in the Earth's crust.Geologist in the 1800s worked out 7 basic principles of stratigraphy that allowed them, and now us, to work out the relative ages of rocks.By doing this repeatedly, for many locations around the world, the geologic time scale has been established.The geologic time scale is a composite vertical sequence representing all known rock units and their fossils, worldwide, placed into sequential order (oldest to youngest), based on relative dating and correlation. Current scientific evidence shows that the Earth is: c) more than 4 billion years old 2.Look at the diagram below representing layers of rocks and the fossils buried in them. (The bottom layer is circled)b) Explain how you know which layer is the oldest.

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As more and more layers are deposited, the older rock layers end up at the bottom and the newer ones toward the top. What is the difference between relative and absolute age?

From the beginning of this course, we have stated that the Earth is about 4.6 billion years old.