Dillet al.(2007) present laser ablation inductively coupled plasma mass spectrometry U-Pb data for torbernite, columbite, and limonite of the Hagendorf and Pleystein pegmatites. These pegmatites, which are intruded into a late Carboniferous granite, have been dated by Glodny (1997) to 317±3 Ma (2σ; 3-point Rb-Sr mineral isochron). Dill et al.(2007) report a torbernite age of 4.55±0.02 Ma, which is in line with earlier geochronological work in the region, showing the young redistribution of U and the formation of secondary U minerals (e.g. Carl and Dill, 1983; Wendt and Carl, 1985). Dill et al.(2007)...

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