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| details | Early Eocene | Middle Pliocene | Canada(NWT) | Norris,G. Palynostratigraphic study. (In: Stratigraphic correlation biostratigraphic zonation;Imp.Ivik K-54, 69'''33'36'' N.Lat,134'''29'01''W.Gon, NWT. L.W.Cummings, editor) | 1977 |