# Isotope dating rocks

Himalayas 10 times younger than previously thought. History of Radiometric Dating. The radioactivity of Potassium 40 is unusual, in that two processes take place:.

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What is Radio dating. The half - life of a radio isotope can be used to measure the age of things. The method is called radio dating. Radio dating can be used to measure the age of rocks see below and carbon dating can be used to date archaeological specimens. Using Uranium - to Date Rock. Some rocks contain uranium - which is radioactive and follows a decay series until it produces a stable isotope of lead. The amount of uranium in the rock is compared to the amount of lead and then the age of the rock can be calculated. For example, it is found that there are equal amounts of uranium and lead in a rock. The proportion of uranium to lead would be 1 to 1 equal amounts.

Click for more info. You have new items in your feed. Radiocarbon dating can be used to date fossils in rocks to give an approximate age. Search for an answer or ask Weegy Free.

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The simplest form of isotopic age computation involves substituting three measurements into an equation of four variables, and solving for the fourth. The equation is the one which describes radioactive decay:. Solving the equation for "age," and incorporating the computation of the original quantity of parent isotope, we get:. Some assumptions have been made in the discussion of generic dating, for the sake of keeping the computation simple. Such assumptions will not always be accurate in the real world. If one of these assumptions has been violated, the simple computation above yields an incorrect age. Note that the mere existence of these assumptions do not render the simpler dating methods entirely useless.

Half - l ife. What is Half - l ife. Half - life is the time taken for half of the radioactive nuclei to decay. Half - life is the time taken for the count rate to fall to half of its original reading. There are a number of ways to define half - life.

Science in Christian Perspective. Wiens has a PhD in Physics, with a minor in Geology. His PhD thesis was on isotope ratios in meteorites, including surface exposure dating.

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The rubidium-strontium dating method is a radiometric dating technique used by scientists to determine the age of rocks and minerals from the quantities they contain of specific isotopes of rubidium 87 Rb and strontium 87 Sr, 86 Sr. Development of this process was aided by German chemists Otto Hahn and Fritz Strassmannwho later went on to discover nuclear fission in December The utility of the rubidium — strontium isotope system results from the fact that 87 Rb one of two naturally occurring isotopes of rubidium decays to 87 Sr with a half-life of In addition, Rb is a highly incompatible element that, during partial melting of the mantle, prefers to join the magmatic melt rather than remain in mantle minerals. As a result, Rb is enriched in crustal rocks.