Initial Reports Volume 192 Chapter 5, Table T6. Range chart showing middle to upper Eocene turnover in abyssal benthic foraminifer assemblages. Notes: A = abundant, C = common, F = few, T = trace, R = rare. Defined by Tjalsma and Lohmann (1983). Core, section, interval (cm) Depth (mbsf) Aragonia aragonensis Quadrimorphina profunda Nuttallides truempyi Abyssamina quadrata Vulvulina spinosa Cibicidoides micrus Alabamina dissonata Abyssamina poagi Clinapertina complanata Gaudryina pyramidata Cibicidoides sp. 13 Stilostomella aculeata Cibicidoides eocaenus Oridorsalis umbonatus Cibicidoides grimsdalei Globocassidulina subglobosa Gyroidinoides altiformis Cibicidoides praemundulus Gyroidinoides soldanii Cibicidoides mexicanus Comments 192-1185A- 2-CC, 18 253.22 F T R C R R T T 3-CC, 13 262.21 F R F F C T R F T late Eocene fauna 4-CC, 17 271.61 F C R R F R R F 5-CC, 9 281.28 F R R A T T F R R R T Transition zone 6-1, 51 289.61 C F R F T T R late Eocene 6-1, 106 290.16 A T T R R T R T middle Eocene 6-2, 4 290.64 A F R T R R R N. truempyi fauna 6-CC, 21 291.27 A T R R F F T F T C A F T R 7-CC, 48 301.82 A R T F C T R R C A R R 8-1, 1 308.41 T T R R R