Ancient World
How Fossils Are Dated: Rock Layers, Ash Beds and Isotopes
A dinosaur bone carries no date stamp. Geologists read the layers around it and the slow ticking of uranium and potassium in volcanic ash to work out its age.
Space, Earth and the natural world, explained.
A dinosaur bone carries no date stamp. Geologists read the layers around it and the slow ticking of uranium and potassium in volcanic ash to work out its age.
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