1953, Clair Cameron Patterson (see also: http://en.wikipedia.org/wiki/Clair_Cameron_Patterson).
First uses of uranium (as oxide): colouring glasses and ceramics
Uranium dating is not better but is used for long times in geology; carbon 14 is used for short times in archaeology.
Radiometric dating based on the decay of the uranium.
Uranium minerals were used from the antiquity as coloring agents for glass and ceramics.
They don't. Carbon-14 has a short half-life and is normally only used by archaeologists or anyone working on sediments less than 50,000 years old. It becomes much less accurate after 40,000 years. Scientists used many different isotopes for dating rocks in Radiometric Dating, uranium/lead, potassium/argon and others are used. The half-life in some of these isotopes is measured in millions or billions of years.
would you use uranium-lead radiometric dating to finnd an igneous rocks age
Uranium dating methods were not used for fossils dating.
Uranium dating is not better but is used for long times in geology; carbon 14 is used for short times in archaeology.
For the uranium-lead method of dating see the link: http://en.wikipedia.org/wiki/Uranium-lead_dating Polonium is not used for dating.
Clair Cameron Patterson
Uranium dating is very useful to evaluate the age of rocks and minerals.
Radiometric dating based on the decay of the uranium.
Uranium minerals were used from the antiquity as coloring agents for glass and ceramics.
The most often used radioactive elements used in radiometric dating are carbon, potassium-argon and uranium-lead.Other elements are not, or very rarely used.
radioactive carbon dating or uranium dating
The two methods are relative dating and radioactive dating for fossils. I think it's the same for rocks.
They don't. Carbon-14 has a short half-life and is normally only used by archaeologists or anyone working on sediments less than 50,000 years old. It becomes much less accurate after 40,000 years. Scientists used many different isotopes for dating rocks in Radiometric Dating, uranium/lead, potassium/argon and others are used. The half-life in some of these isotopes is measured in millions or billions of years.
Radioactivity. The use of radioactive elements like Uranium (U) and Thorium (Th).