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GFZ - German Research Centre for GeosciencesIn order to dissolve minerals from its compound that are suitable for radiometric dating and to get rid of their adhesions in the best possible way, the stone is ground several times with the jaw crusher and the roller mill. The minerals suitable for the chosen dating methodology are separated using density differences, magnetic properties and grain shape. Subsequently, the millbase is sieved; the finer grain fraction is of interest for further processing.
The Wilfley wet-shaking hearth …