GONDWANALAND AND GONDWANA 135 Figure Late Ordovician (458 443 Ma) palaeogeography: DB, the glacimarine Don Braulio Formation; AR, Arabian upland; SU, Sudan upland; E, area of evaporite deposition; ỵ anorogenic complex Reproduced with permission from Veevers JJ (2004) Gondwanaland from 650 500 Ma assembly through 320 Ma merger in Pangaea to 185 100 Ma breakup: supercontinental tectonics via stratigraphy and radiometric dating Earth Science Reviews