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  • lateral movements in the Early Cretaceous. During this period, the Antarctic Peninsula area occupied an important paleogeographical position, near the junction of major new seaways that were opening between South America and Africa, along the eastern coast
  • , and the surface of the Moho discontinuity. The rift zones are commonest in the lows of bedrock relief related to extensive intra and pericontinental structural depressions. This suggests that the Antarctic shelf, which is about 40 % of the total area