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Upper Llandovery (Telychian) graptolites of the <i>Oktavites spiralis</i> Biozone from the Long Dai Formation, at Lam Thuy village, Quang Binh Province, central Vietnam

Mark Williams et al.
HAL (France) · Papers
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A numerically small graptolite assemblage from the Long Dai Formation at Lam Thuy village, southwestern Le Thuy district, Quang Binh Province, central Vietnam, includes Oktavites spiralis (Geinitz). The relative abundance of this species in the assemblage, coupled to its occurrence with Oktavites bo
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