Radiometric dating used to date fossils of dinosaurs

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Description: Currently you are watching Radiometric dating used to date fossils of dinosaurs porn video. You can find more videos like Radiometric dating used to date fossils of dinosaurs below in the related videos section. When paleontologist Mary Schweitzer found soft tissue in a Tyrannosaurus rex fossil , her discovery raised an obvious question -- how the tissue could have survived so long? The bone was 68 million years old, and conventional wisdom about fossilization is that all soft tissue, from blood to brains , decomposes. Only hard parts, like bones and teeth, can become fossils. Instead, other methods are used to work out a fossil's age. These include radiometric dating of volcanic layers above or below the fossils or by comparisons to similar rocks and There are two main methods to date a fossil.

Added: 12.10.2018 at 23:41

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