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The isotopes There are a number of isotopes of interest in U-Pb dating. It has a half-life of 4. It is also useful to know of the existence of Pb lead , which is neither unstable nor radiogenic. Isochron dating and U-Pb We can always try U-Pb dating using the isochron method , but this often doesn’t work: There seem to be two reasons for this.

Where as absolute age dating (U-Pb, Ar/Ar etc.) are used on minerals from igneous and metamorphic rocks, as they can date the age of crystallization or metamorphism the rock experienced. Index fossils are used in relative dating.

Several Christian ministries promote the idea that the earth is less than 10, years old, which they say comes from the Bible. In reality, the Bible makes no claim as to the age of the earth, although it does establish a minimum age. This page examines some of the history of the controversy—what the Bible actually says and does not say—and the scientific evidence surrounding the age of the earth. Age of the earth according to the Bible The following is a summary of the biblical evidence presented on this website regarding the age of the earth.

For more detailed explanations of each topic, please click on the associated link. History of the age of the earth As indicated earlier, the Bible does not fix the age of the earth, contrary to the claims of Answers in Genesis. Archbishop Ussher took the genealogies of Genesis, assuming they were complete, and calculated all the years to arrive at a date for the creation of the earth on Sunday, October 23, B.

There are a number of other assumptions implicit in the calculation. The first, and foremost, assumption is that the genealogies of Genesis are complete, from father to son throughout the entire course of human existence. The second assumption is that the Genesis creation “days” were exactly hours in length. It turns out that both assumptions are false.

Incomplete genealogies Biblical Genealogies Although Archbishop Ussher assumed the Genesis genealogies were complete, it is clear from the rest of the Bible that those genealogies were telescoped some names were left out for the sake of brevity , which is common in biblical genealogies but rare in modern genealogies.