Table 2. First and last occurrences of stratigraphic marker taxa recorded from Site 985.
Core, section | Depth (mbsf) | First occurrence | Last occurrence | Age determination |
---|---|---|---|---|
162-985A- | early Miocene, Burdigalian | |||
32X-1 | 290.49 | Nematosphaeropsis
downiei (Brown, 1986: early Miocene/NN3-4) Pyxidinopsis sp. 1 Manum et al. (1989) (104-643A-15H-6 = 17 Ma) |
||
32X-2 | 291.99 | Labyrinthodinium
truncatum (Williams et al., in press: 17.5 Ma; 104-643A-14H-5 = 16.8 Ma) |
||
34X-2 | 311.19 | Batiacasphaera
baculata sensu Manum et al. (1989) (= "Kallosphaeridium biornatum" group of Heilmann-Clausen and Costa, 1990) (104-643A-24X-5 = 18 Ma) Lophocysta sulcolimbata (104-643A-11H-5 = 12 Ma) |
||
34X-5 | 315.69 | Cordosphaeridium
minimum = Dinocyst II, Manum (1976) and Manum et al. (1989) (104-643A-23X-5 = 18 Ma) |
||
35X-1 | 319.39 | Hystrichosphaeropsis
obscura (Williams et al., in press: 19 Ma; 104-643A-37X-3 = 22.5 Ma) |
Hystrichokolpoma
sp. 2 Manum et al. (1989) (Zevenboom, 1995: 17.3 Ma; 104-643A-28X-7 = 19 Ma), Evittosphaerula paratabulata (104-643A-27X-5 = 19 Ma |
|
35X-2 | 320.89 | Apteodinium
australiense (Williams et al., in press: 12.25 Ma; 104-643A-19X-6 = 16 Ma) |
||
35X-6 | 326.89 | Leptodinium sp. III Manum (1976) and Manum et al. (1989) (104-643A-31X-2 = 20 Ma | ||
36X-2 | 330.49 | Nematosphaeropsis
downiei (Powell, 1986a as Nematosphaeropsis? sp. A: 23.8 Ma) Hystrichokolpoma sp. 2 Manum et al. (1989) (Zevenboom, 1995: 17.3 Ma; 104-643A-36X-5 = 22 Ma) |
||
36X-5 | 334.99 | Lophocysta
sulcolimbata (104-643A-32X-1 = 20.5 Ma) |
||
early Miocene Aquitanian | ||||
37X-5 | 344.59 | Evittosphaerula
paratabulata (104-643A-34X-2 = 21 Ma) |
||
39X-5 | 363.79 | Leptodinium
italicum (= Leptodinium sp. II Manum, 1976; Impagidinium sp. 1
Manum et al., 1989) (Williams et al., in press: 18.51 Ma; 104-643A-28X-7 = 19 Ma; 38-338-14-2 = 20 Ma) |
||
40X-2 | 368.89 | Batiacasphaera
baculata sensu Manum et al. (1989) (= "Kallosphaeridium biornatum group" of Heilmann-Clausen and Costa, 1990) (104-643A-41X-1 = 24 Ma) |
||
41X-6 | 384.09 | Caligodinium
amiculum (Williams et al., in press: 21.1 Ma; 104-643A-36X-5 = 22 Ma) |
||
48X-3 | 447.49 | Cordosphaeridium
cantharellum (Williams et al., in press: 17.95 Ma; 104-643A-22X-5 = 18 Ma) |
||
48X-4 | 448.99 | Leptodinium
III Manum (1976) and Manum et al. (1989) (104-643A-33X-1 = 21 Ma) |
||
48X-6 | 451.99 | Chiropteridium
galea (Williams et al., in press: 22.5 Ma; 104-643A-44X-1 = 25 Ma) |
?early Miocene | |
50X-5 | 469.59 | Spiniferella
cornuta (Benedek, 1972: 27 Ma; 104-643A-47X-4) Distatodinium biffii (Williams et al., in press: 24.5 Ma; 104-643A-45X-6: 25.5 Ma) |
Oligocene, possibly Chattian | |
51X-2 | 474.69 | Areoligera
semicirculata (= Glaphyrocysta intricata in Manum et al. (1989) (Williams et al., in press: 30.5 Ma; 104-643A-47X-1) |
Rupelian | |
52X-1 | 482.79 | Leptodinium
italicum (= Leptodinium sp. II Manum, 1976; Impagidinium sp. 1
Manum et al., 1989) (Williams et al., in press: 31.82 Ma; 38-338-24-2 = 27 Ma; 104-643A-46X-5) |
Lophocysta sp. 2 (104-643A: in 48X-6 only) | |
53X-4 | 496.89 | Deflandrea sp. B of Powell (1986b) sensu Manum et al. (1989) (104-643A-47X-4) | ||
54X-2 | 503.49 | Pyxidinopsis
sp. 1 Manum et al. (1989) (104-643A-48X-1) |
Saturnodinium
pansum (Williams et al., in press: 30.24 Ma; 151-908A-24X) |
|
54X-6 | 509.49 | Batiacasphaera
micropapillata (Williams et al., in press: 30.5 Ma; 104-643A-48X-1) |
||
55X-4 | 516.09 | Gen. et sp. indet. (104-643A: in 48X-1 only) |
||
56X-1 | 521.29 | Gen. et sp. indet. (104-643A: in 48X-1 only) |
||
59X-1 | 550.09 | Dinocyst 3 Manum et
al. (1989) (104-643A-48X-6) |
||
59X-2 | 551.59 | Svalbardella
cooksoniae (Johnsen, 1983: 336-21-1 = 30.5 Ma; Costa and Manum, 1988: approximately 30.5 Ma; 104-643A-50X-1) |
||
60X-3 | 562.79 | Reticulatosphaera
actinocoronata (Williams et al., in press: 35.1 Ma; 104-643A-47X-1) Lophocysta sp. 2 (104-643A: in 48X-6 only) |
||
60X-5 | 565.79 | Apteodinium
spiridoides (Williams et al., in press: 31.5 Ma; 104-643A-46X-1) |
Spiniferites
sp. 1 Manum et al. (1989) (104-643A-49X-3) |
|
61X-3 | 571.57 | Distatodinium
biffii (Williams et al., in press: 28.5 Ma; 104-643A-46X-3) |
||
62X-1 | 579.09 | Dinocyst 3 Manum et
al. (1989) (104-643A-48X-6) Deflandrea sp. B of Powell (1986b) sensu Manum et al. (1989) (104-643A-53X-3) Areoligera semicirculata (Williams et al., in press: 33.5 Ma) Spiniferites sp. 1 Manum et al. (1989) (104-643A-49X-4) |
||
Notes: First and last occurrences from published sources are quoted above (Leg 104, Site 643 data: Manum et al. [1989]; Leg 151, Site 908 data: Poulsen et al. [1997]; Leg 38, Site 338 data: Manum [1976]. Absolute ages quoted for cores from Sites 643 and 338 are according to R.M. Goll [unpubl. data]).