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Geological Society, London, Memoirs; 1990; v. 12; p. 1-21;
DOI: 10.1144/GSL.MEM.1990.012.01.01
© 1990 Geological Society of London

Revised World maps and introduction

C.R. Scotese1 & W. S. McKerrow2

1 Bellaire Research Center, Shell Development Company, PO Box 481, Houston TX 77001, USA
2 Department of Earth Sciences, Oxford University, Parks Road, Oxford OX1 3PR, UK

We review the highlights of the 1988 symposium on Palaeozoic Biogeography and Palaeogeography, and present a revised set of 20 Palaeozoic base maps that incorporate much of the new data presented at the symposium. The maps include 5 major innovations: (1) A preliminary attempt has been made to describe the motion of the Cathaysian terranes during the Palaeozoic; (2) a more detailed description of the events surrounding the Iapetus Ocean is presented; (3) an alternative apparent polar wandering path for Gondwana has been constructed using the changing distributions of palaeoclimatically restricted lithofacies; (4) new palaeomagnetic data have been incorporated that places Laurentia and Baltica at more southerly latitudes, and adjacent to Gondwana, during the Early Devonian; Siberia is also placed further south in the light of biogeographic data presented at the symposium; (5) Kazakhstan is treated as a westward extension of Siberia, rather than as a separate palaeocontinent. The relationships between climatic changes, sea level changes, evolutionary radiations and intercontinental migrations are discussed




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