The 26 Al — 26 Mg chronometer gives an estimate of the time period for formation of primitive meteorites of only a few million years 1. Archived from the original on 31 March Does the volcanic strata belong where it landed? Doing this, one can "map" out where the fossil appeared in the geographic time scale and thus work out a rough estimate of the fossil's age, by comparing it to other fossils i. Such an inconsistency would, logically, confuse geologists in the future if they had no prior knowledge of the St.
It would be a curving downward slope.
The mass spectrometer was invented in the s and began to be used in radiometric dating in the s. For example, in decomposing organic bodies - such as an animal carcass - carbon, an isotope of carbon, is present. For instance, carbon has a half-life of 5, years. In uranium—lead datingthe concordia diagram is used which also decreases the problem of nuclide loss. Scientists can use decay rates to, very roughly, determine the age of a fossil or artifact.