Upper Carboniferous glacial sedimentation in the Karoo Basin near Prieska, South Africa Visser, J. N. J. Abstract Publication: Palaeogeography Palaeoclimatology Palaeoecology Pub Date: May 1982 DOI: 10.1016/0031-0182(82)90065-7 Bibcode: 1982PPP....38...63V