Does radioactive dating with isotopes of uranium and thorium provide an estimate to the beginning middle or end of earths formation?

Answer 1

Method of dating very old rocks by means of the amount of common lead they contain. Common lead is any lead from a rock or mineral that contains a large amount of lead and a small amount of the radioactive precursors of lead (i.e., the isotopes uranium-235, uranium-238, and thorium-232). By this method, the age of the Earth has been estimated to be c. 4.6 billion years. This figure is in good agreement with the age of meteorites and the age of the Moon as determined independently.

Radiometric dating is used to date rocks (like at the Grand Canyon) to approximately see how old the earth is. it is inaccurate though. the rocks actually decay faster than they are supposed to. for example: if we take one rock and see how old it is using radiometric dating for one year, it might say it is 10,000 years old. hope it helps!

Radiometric dating is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials.

Answer 2

No. This method estimates the age of the oldest unmelted surface rocks on earth. Since the surface of earth probably melted many times as the planed formed, the earth shoul dbe older than these rocks.

Answer 3

The upper limit of uranium-thorium-230 dating is 500 000 years.

Answer 4

Yes