Igneous rocks dating

The third assumption is invalidated by discordant dates—that is, different dating techniques do not agree with each other or with known historic dates and by consistently finding vast ages from recently solidified magma.

Such enormous tectonic events would cause accelerated nuclear decay which, in turn, would result in a profusion of observed daughter isotopes.Igneous rocks are those that form via the process of melting and cooling.If they erupt from volcanoes onto the surface as lava, they are called extrusive rocks.Although the subject of radioisotope dating may seem a bit complicated, the dating method is rather straightforward.Igneous and metamorphic rocks, which were once extremely hot and have cooled into solid rock, are dated using the following methods: uranium-238 to lead-206, uranium-235 to lead-207, potassium-40 to argon-40, and rubidium-87 to strontium-87, and are viewed as capable of providing an “absolute” age since solidification.

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