Carbon Dating Bogus Says Friend

[boracay]

Other radiogenic dating techniques include:
* Fission track dating
* Uranium-thorium dating
* Uranium-lead dating
* Cosmogenic isotope dating
* Rubidium-strontium dating
* Samarium-neodymium dating
* Rhenium-osmium dating
* Lutetium-hafnium dating
* Paleomagnetic dating
* Thermo-luminescence dating (quartz exposure to heat)
(wiki)

The oldest rocks which have been found so far (on the Earth) date to about 3.8 to 3.9 billion years ago (by several radiometric dating methods). 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.

While these values do not compute an age for the Earth, they do establish a lower limit (the Earth must be at least as old as any formation on it). This lower limit is at least concordant with the independently derived figure of 4.55 billion years for the Earth's actual age.

The most direct means for calculating the Earth's age is a Pb/Pb isochron age, derived from samples of the Earth and meteorites. This involves measurement of three isotopes of lead (Pb-206, Pb-207, and either Pb-208 or Pb-204). A plot is constructed of Pb-206/Pb-204 versus Pb-207/Pb-204. link