discussions about zircons in general and the Caledonides in particular. A big thank you goes to all my colleagues and friends at the Geology Department, who made my .. This thesis works with the U-(Th)-Pb system. In general . later events. Therefore, they can contain the oldest ages of rocks, and date the formation of.
20 Jun 2015 Six-Day Creation: Does it matter what you believe? . A colleague, Dr Tas Walker, advises that, “the Concordia technique arose from the fact that the two However, this only works if there is one metamorphic event. That is, that while U-Pb dating gives an 'age' for certain zircon crystals (the same type of