Media type: E-Article Title: U-Pb investigations on zircons from pre-Variscan gneisses—I. A study from the Schwarzwald, West Germany Contributor: Todt, Wolfgang A.; Büsch, Wilhelm imprint: Elsevier BV, 1981 Published in: Geochimica et Cosmochimica Acta Language: English DOI: 10.1016/0016-7037(81)90010-7 ISSN: 0016-7037 Keywords: Geochemistry and Petrology Origination: Footnote: