Stratigraphic occurrence of selected diatom species from the Miocene at ODP H...
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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)...
D(优势(dominant)):占组合(assemblage)总量的60%以上;A(丰富(abundant)):占组合总量的30%~60%;C(常见(common)):占组合总量的15%~30%;F(稀少(few)):占组合总量的3%~15%;R(稀有(rare)):占组合总量的0.5%~3%;T(痕迹(trace))……



