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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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The interpretation of past movements of land areas and their degree of emergence involves suppositions and uncertainties. Apparently, from at least the Mesozoic to the present, water barriers have existed and have served as an isolating mechanism for terrestrial organisms. Further data and interpretation are needed before much of our speculation on the past movements of organisms can be said to have a firm factual basis.
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