Dating fussen geological craigsdatingsite com jo

For centuries people have argued about the age of the Earth; only recently has it been possible to come close to achieving reliable estimates.

When disturbed rocks are studied, the different techniques may give different readings, and much research has been carried out on how to interpret such results.The other key dating techniques involve uranium-235 transforming to lead-207 at a rate of one-half every 713 million years, uranium-238 becoming lead-206 at one-half every 4.5 billion years, potassium changing to argon (and calcium) at one-half every 1.3 billion years and samarium-147 becoming neodymium-143 at one-half every 106 billion years.These radioactive processes present a set of natural clocks which reveal when the rock was formed, or when it was last heated severely.They have clearly fallen to Earth from outside, often gouging out huge craters such as that called New Québec (61°17´ N, 73° 41' W).Rubidium-strontium, potassium-argon, uranium-lead and samarium-neodymium dating all show that the meteorites formed about 4.6 billion years ago.

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