Carbon dating supports evolution
For example, about 1.5 percent of a quantity of Uranium 238 will decay to lead every 100 million years.
By measuring the ratio of lead to uranium in a rock sample, its age can be determined.
Mineralization of organic material is very common in fossils.
Obviously Carbon 14 can not be used in mineralized fossils.
Using this technique, called radiometric dating, scientists are able to "see" back in time.
Scientists use a technique called radiometric dating to estimate the ages of rocks, fossils, and the earth.
Before then, the Bible had provided the only estimate for the age of the world: about 6,000 years, with Genesis as the history book.
Also the calculation are based on assumptions that the layer started with no lead and 100% uranium and no erosion has occurred.
Scientists discovered that rocks could be timepieces -- literally.
Many chemical elements in rock exist in a number of slightly different forms, known as isotopes.
Measuring the uranium-to-lead ratios in the oldest rocks on Earth gave scientists an estimated age of the planet of 4.6 billion years.
Segment from A Science Odyssey: "Origins."Geologists have calculated the age of Earth at 4.6 billion years.