Age of the Earth strengths and weaknesses of dating methods
{"Image DocumentName": "Radiometric Dating Methods of radiometric dating", "Image ImageDescription": "Potassium\u2013Argon Dating. Potassium-40 decays to argon-40 and calcium-40. Half-life of potassium-40 is 1.3 billion years. Calculating the ratio of remaining potassium-40 to amount originally there provides close mathematical estimate of the age of rock deposit. Rate of decay of uranium into lead. One of the most useful radioactive clocks. Can date age of earth. Error is less than 1% over 2 billion years.", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}