But once Gondwana took up its polar position in the late Ordovician, massive glaciers formed over Africa at the supercontinent's center. This heralded a 20-million-year ice age during which ...

The supercontinent of Gondwana was still positioned over the South Pole but the vast icecaps of the late Ordovician period melted almost to nothing. Sediments formed from massive quantities of ...

northern Nova Scotia is part of a micro-continent (Avaland) that was sandwiched during continental collision between North America and a part of Gondwana southern Nova ... Arrows give ...

Work is still continuing on Ordovician traces from Gondwana. International collaboration is also ongoing with work into Portuguese Ordovician biostratigraphy and palaeogeography. Two papers have ...

A team of paleontologists from the American Museum of Natural History, the Australian Museum Research Institute, and the WB Clarke Geoscience Center, in Australia, has added new evidential data ...

Starting at the beginning of the Cambrian Period around 540 million years ago, it then moves through the Ordovician, Silurian ... This granite was in fact formed when the huge landmass Gondwana ...

PDF 16. Grunow, A.M. and Encarnacion, J. (2000) Cambro-Ordovician paleomagnetic and geochronologic data from southern Victoria Land, Antarctica: Revision of the Gondwana apparent Polar Wander Path.