BBC - GCSE Bitesize Dating rocks Fossils are the remains of animals or plants that lived a long time ago. Dating rocks. Radioactivity can be used to date rocks. If a rock has a uranium to lead ratio of 11, one half-life must have passed since it formed. This would.
Carbon 14 dating 2 video Khan Academy Footprints, flowers, even droppings; all of these things can be turned into fossils under the rht conditions. Although, most geologists "never use carbon dating", source. Then you do the reverse calculation based on the known half-life of C14 to work out what the.
Dating fossils using half life:
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