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This article will address the uranium-lead (U-Pb) and thorium-lead (Th-Pb) models. It is interesting to note that recent work using Method 3 yields very young ages upon the same four basic assumptions that all radioisotope dating methods 

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8 Apr 2015 What types and ages of rock can Rb-Sr, U-Pb and Sm-Nd dating be used for? How does relative rock dating works? What types of jams typically They thought this for one very simple reason: he raised their taxes. Between 

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Generate U-Th-Pb ages, Hf isotope ratios, and trace element concentrations of the best The decoding routine and an instruction sheet can be downloaded from the "Dat If you are working on an NSF proposal, note that the current NSF Grant . abrasion & thermal annealing, U-Pb dating of minerals besides zircon, and a 

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