Dating in th

27 Jun

Unfortunately, the age cannot be computed directly from material that is solely from the Earth.

There is evidence that energy from the Earth's accumulation caused the surface to be molten.

) and they are historically the ones posted to more than any others.

See the Isochron Dating FAQ or Faure (1986, chapter 18) for technical detail.A plot is constructed of Pb-206/Pb-204 versus Pb-207/Pb-204.If the solar system formed from a common pool of matter, which was uniformly distributed in terms of Pb isotope ratios, then the initial plots for all objects from that pool of matter would fall on a single point.Some of these rocks are sedimentary, and include minerals which are themselves as old as 4.1 to 4.2 billion years.Rocks of this age are relatively rare, however rocks that are at least 3.5 billion years in age have been found on North America, Greenland, Australia, Africa, and Asia.