Radiometric dating



Dating Fossils – How Are Fossils Dated?

Carbon dating is used to determine the age of biological artifacts up to 50, years old. This technique is widely used on recent artifacts, but educators and students alike should note that this technique will not work on older fossils like those of the dinosaurs alleged to be millions of years old. This technique is not restricted to bones; it can also be used on cloth, wood and plant fibers. Carbon dating has been used successfully on the Dead Sea Scrolls, Minoan ruins and tombs of the pharaohs among other things.

Carbon is a radioactive isotope of carbon. The half-life of carbon is approximately 5, years. The short half-life of carbon means it cannot be used to date fossils that are allegedly extremely old, e. The question should be whether or not carbon can be used to date any artifacts at all? The answer is not simple. There are a few categories of artifacts that can be dated using carbon; however, they cannot be more 50, years old.

Carbon cannot be used to date biological artifacts of organisms that did not get their carbon dioxide from the air. This rules out rsdioactive dating for most aquatic organisms, because they often obtain at least some of their carbon from dissolved carbonate rock. The age of the carbon in the rock is different from that of isotoped carbon in the air and makes carbon dating data for those organisms inaccurate under the assumptions normally used for carbon dating.

This restriction dxting to animals that consume seafood in radioactive isotopes for dating fossils diet. As stated previously, carbon dating radioactive isotopes for dating fossils be used on artifacts over about 50, years old. These artifacts have gone through many carbon half-lives, and the amount of carbon remaining in them is miniscule and very difficult to detect. Carbon dating cannot be used on most fossils, not only because they are almost always datung too old, but also because they rarely contain the original carbon of the organism that has been fossilized.

Also, many fossils are contaminated with carbon from the environment during collection or preservation procedures. Scientists attempt to check the accuracy of carbon dating by comparing carbon dating data to data from other dating methods. Other methods scientists use include counting rock layers and tree rings. When scientists first began to compare carbon dating data to radioactive isotopes for dating fossils from tree rings, they found carbon dating provided "too-young" estimates of artifact age.

Ravioactive now realize that production of carbon has not been constant over the years, but has changed as the radiation from the sun has fluctuated. Nuclear tests, nuclear reactors radioactive isotopes for dating fossils the use of nuclear weapons have also changed the composition of radioisotopes in the air over the last few decades. This human nuclear activity will make precise dating of fossils from our lifetime very difficult due to contamination of the normal radioisotope composition of isotopee earth with addition artificially radioactive isotopes for dating fossils radioactive atoms.

The various confounding factors that can adversely affect the accuracy of carbon dating methods dting evident in many of the other radioisotope dating methods. Although the half-life of some of them are more consistent with the evolutionary worldview of millions to billions of years, the assumptions used in radiometric dating put the results radioactive isotopes for dating fossils all radiometric dating methods in doubt.

The following is an article on this subject. Although the half-life of carbon makes it unreliable for dating fossils over about 50, years old, there are other isotopes scientists use to date older artifacts. These isotopes have longer half-lives and so are found in greater abundance in older fossils. All of these methods are accurate only back to the last global catastrophe i. The assumptions are similar to the assumptions used in carbon dating.

The mathematical premise undergirding the use of these elements in radiometric dating contains the similar confounding factors that we find in carbon dating method. Most scientists today believe that life has existed on the earth for billions of years. This belief in long ages for the earth and the evolution of all life is based entirely on the hypothetical and non-empirical Theory of Evolution. All dating methods that support this theory are fossils, while any evidence to the contrary, e.

Prior to radiometric dating, evolution scientists used index fossils a. A paleontologist would take radioactive isotopes for dating fossils discovered fossil to a geologist who would ask the paleontologist what other fossils searching for k2 christian dating index fossil were found near their discovery. If it sounds like circular reasoning, it is because this process in reality is based upon circular reasoning.

The process of using index fossils is describes by the late Creationist author and Ph. Henry Morris as follows:. Dating agency redditch radiometric dating methods use this basic isotopess to extrapolate the age of artifacts being tested. These long time periods are computed by measuring the ratio of daughter to parent substance in a rock, and inferring an age based on this ratio.

This age is computed under the assumption that the parent substance say, uranium gradually decays to the daughter substance say, leadso the higher the ratio of lead to uranium, the older the rock must be. While there are many problems with such dating methods, such as parent or daughter substances entering or leaving the rock, e. Geologists assert that generally speaking, older dates are found deeper down in the geologic column, which they take as evidence that radiometric dating is giving true ages, since it is apparent that rocks that are deeper must be older.

But even if it is true that older radiometric dates are found lower down in the geologic column radioactive isotopes for dating fossils is open to questionthis can potentially be explained radioactive isotopes for dating fossils processes occurring in magma chambers which cause the lava erupting earlier to appear older than the lava erupting later. Lava erupting earlier would come from the top of the magma chamber, fossiks lava erupting later would come from lower down.

A number of processes could cause the parent substance to be depleted at the top of radioactive isotopes for dating fossils magma chamber, or the daughter product to be enriched, both of which would cause the lava erupting earlier to appear very old according to radiometric dating, and lava erupting later to appear younger.


How to Do Half-Life Problems of Radioactive Isotopes