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Stratigraphic occurrence of selected diatom species from the Miocene at ODP S...
D (dominant) = >60 % of assemblage; A (abundant) = 30-60 % of assembl.; C (common) = 15-30% of assembl.; F (few) = 3-15 % of assembl.; R(rare) = 0.5-3% of assembl.; T(trace)...