10.6084/m9.figshare.3454769.v1 Anelda Van Staden Anelda Van Staden Udo Zimmermann Udo Zimmermann Farid Chemale Jr Farid Chemale Jens Gutzmer Jens Gutzmer G.J.B. Germs G.J.B. Germs Correlation of Ordovician diamictites from Argentina and South Africa using detrital zircon dating Geological Society of London 2016 diamictite detrital South zircon Geology 2016-06-21 12:20:14 Dataset https://geolsoc.figshare.com/articles/dataset/Correlation_of_Ordovician_diamictites_from_Argentina_and_South_Africa_using_detrital_zircon_dating/3454769 <p>The results of detrital zircon U–Pb geochronology suggest a maximum depositional age of 485 ± 7.2 Ma for a glacial diamictite from the Sierra del Volcán in eastern Argentina (Tandilia System). Earlier interpretations associated the deposit with the Neoproterozoic ‘snowball Earth' hypothesis. The data allow direct correlation, for the first time, between Early Palaeozoic deposits in both South America and South Africa connecting the glacial deposits from southern Bolivia to central Argentina with those in South Africa (Pakhuis Formation). On the basis of these results, a new distribution map of glacial cover, corresponding to the Hirnantian stage, can be developed. </p>