Abstract
Abstract Abundant and varied microplankton populations described by Manum from Graham Island and by Manum and Cookson from Graham and Ellef Ringnes islands of the Canadian Arctic Archipelago were assigned by those authors to the Hassel Formation of upper Albian or lower Cenomanian age. Present studies indicate that the assemblages treated by Manum and Cookson were from the Kanguk Formation, rather than the Hassel Formation, with ranges from lower Campanian to upper Cenomanian. Evidence for this discrepancy is presented from investigations of the Kanguk and Hassel formations at several Arctic localities.
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