Absolute age hookup for rocks are calculated by
{"Image DocumentName": "How can knowing the half-life of Carbon-14 help scientists", "Image ImageDescription": "find out the age of a fossil? Radiometric dating - measure amounts of parent/daughter. materials; if know half-life of material and original amount, Can calculate absolute age. Carbon-14 is useful for dating rocks and fossils up to 75,000. years old. Uranium 238 is used for older objects. Based on radiometric dating, the age of the earth is estimated. to be 4.6 billion years.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}