(Table 1A) Distribution of calcareous nannofossil species at DSDP Hole 25-245@en

Abundance - V = very abundant, (more than 10 specimens/field of view); A = abundant, (1 to 10 specimens/field of view); C = common, (1 specimen/2-10 fields of view); F = few, (1 specimen/11-100 fields of view); R = rare, (1 specimen/101-1000 fields of view); - = none found. Preservation - P = poor, M = moderate, G = good.丰度（Abundance）分级：V = 极丰富（单视野内标本数量超过10件）；A = 丰富（单视野内标本数量为1至10件）；C = 常见（每2至10个视野内可见1件标本）；F = 稀少（每11至100个视野内可见1件标本）；R = 罕见（每101至1000个视野内可见1件标本）；- = 未发现标本。保存状态（Preservation）分级：P = 差；M = 中等；G = 良好。