![]() | Up a level |
Barton, E. S.; Altermann, Wladyslaw; Williams, I. S.; Smith, C. B. (1994): U-Pb zircon age for a tuff in the Campbell Group, Griqualand West Sequence, South Africa. Implications for early Proterozoic rock accumulation rates. In: Geology, Vol. 22, No. 4: pp. 343-346 [PDF, 459kB]