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Lower Cretaceous Inoceramus zones of the northwestern Pacific
Abstract:A study of the Lower Cretaceous deposits of the northwestern Pacific province reveals Inoceramus zones in arenaceous-argillaceous sequences traceable over most of the area, representing the Hauterivian, Barrermian, Aptian, and Albian stages. Inoceramus was found to occur very rarely in the Valanginian. – IGR Staff.
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