Absolute dating vs relative dating fossils
WEATHERING AND EROSION ARE BOTH KNOWN AS LEVELING FORCES - WHICH MEANS THEY WEAR DOWN AND REMOVE ROCKS THAT ARE EXPOSED ON EARTH'S SURFACE.WEATHERING IS THE BREAKUP OF ROCKS AT EARTH'S SURFACE DUE TO EXPOSURE TO THE ATMOSPHERE.These two uranium isotopes decay at different rates. The half-life of the uranium-238 to lead-206 is 4.47 billion years.The uranium-235 to lead-207 decay series is marked by a half-life of 704 million years.Because its half-life is so long it is useful for dating the oldest rocks on Earth, but not very reliable for rocks under 10 million years old. This is ten times the age of the Earth, so very little Rubidium has decayed at all.
They release radiation until they eventually become stable isotopes of lead.Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.