Table 7. Overall diatom abundance estimated from smear slides for Hole 1084A.
Core, section,
interval (cm)
Depth
(mbsf)
Overall
abundance
(smear slides)
Depth
(mbsf)
Dominant assemblage
Cold-water marker species
Diatom and/or silicoflagellate datums
175-1084A-
1H-CC 2.88 3.0 2.88
Upw. + oceanic


2H-CC 12.77 4.5 12.77
Upw. + oceanic


3H-CC 22.51 3.5 22.51
Upwelling


4H-CC 31.89 4.0 31.89
Upw. + oceanic


5H-CC 41.68 3.5 41.68
Upw. + oceanic


6H-2, 10 42.50 2.5 42.50



6H-3, 80 44.70 6.0 44.70
Upwelling
F. kerguelensis, H. karstenii

6H-5, 110 47.90 6.0 47.90
Upwelling


6H-6, 110 50.90 2.0 50.90



6H-CC 51.03 3.5 51.03
Upw. + oceanic
F. kerguelensis, H. karstenii

7H-CC 60.65 2.0 60.65



8H-CC 70.02 3.0 70.02
Upw. + oceanic


9H-CC 79.55 3.5 79.55
Upwelling


10H-CC 89.03 4.0 89.03
Upw. + oceanic


11H-CC 98.69 4.0 98.69
Upw. + neritic + oceanic
R. hebetata f. hebetata
<< LO N. reinholdii (0.65 Maa) 0.69 Mab
12H-CC 108.35 4.0 108.35
Upw. + oceanic
R. hebetata + F. kerguelensis

13H-CC 117.72 6.0 117.72
Upwelling


14H-CC 127.02 3.0 127.02
Oceanic


15H-CC 136.63 4.5 136.63
Upw. + oceanic


16H-CC 143.12 4.5 143.12
Upw. + neritic + oceanic
R. hebetata f. hebetata
<< LO B. quadrangula 0.8 Mab
17H-CC 149.83 3.0 149.83

R. hebetata f. hebetata

19X-CC 158.46 4.5 158.46
Upwelling
R. hebetata f. hebetata

20X-CC 167.83 3.0 167.83
Upw. + oceanic


21X-CC 180.33 4.0 180.33
Upw. + neritic + oceanic


22X-CC 182.77 2.5 182.77



23X-CC 195.46 4.0 195.46
Upw. + oceanic


24X-CC 206.98 3.0 206.98
Upw. + oceanic


25X-CC 219.65 3.5 219.65
Upw. + neritic + oceanic
R. hebetata f. hebetata

26X-CC 222.61 3.0 222.61
Upw. + oceanic


27X-CC 235.79 5.0 235.79
Upw. + oceanic


28X-CC 248.62 5.0 248.62
Upw. + oceanic


29X-CC 254.47 2.0 254.47



30X-CC 265.89 3.5 265.89
Upw. + oceanic
P. barboi
<< LO P. barboi (1.58 Maa) 1.68 Mab
31X-CC 271.74 4.0 271.74
Upwelling
H. karstenii, P. barboi

32X-CC 283.18 5.0 283.18
Upwelling
H. karstenii, P. barboi

33X-CC 294.69 4.0 294.69
Upwelling
H. karstenii, P. barboi, T. kolbei, T. lentiginosa
<< ?LO T. kolbei (1.89 Maa)1.96 Mab
34X-CC 304.37 3.0 304.37

H. karstenii, P. barboi

35X-CC 313.19 4.5 313.19
Upw. + oceanic
P. barboi

36X-CC 322.77 4.0 322.77
Oceanic
P. barboi

37X-CC 335.53 6.0 335.53
Upwelling (spores + setae)
H. karstenii, P. barboi

38X-CC 344.79 6.0 344.79
Thalassionemataceae + spores
H. karstenii, P. barboi

39X-CC 354.30 6.0 354.30
Thalassionemataceae + spores
H. karstenii, P. barboi

40X-CC 364.31 6.0 364.31
Thalassionemataceae + spores
P. barboi

41X-CC 373.95 6.0 373.95
Thalassionemataceae
P. barboi

42X-CC 382.44 6.0 382.44
Upwelling (spores + setae)
P. barboi

43X-CC 393.57 6.0 393.57
Thalassionemataceae + spores
P. barboi

44X-CC 403.19 5.0 403.19
Thalassionemataceae + spores
P. barboi

45X-CC 412.78 6.0 412.78
Thalassionemataceae + spores
H. karstenii

46X-CC 422.12 6.0 422.12
Thalassionemataceae + spores
P. barboi

47X-CC 429.04 6.0 429.04
Upwelling (spores + setae)
H. karstenii

48X-CC 439.49 6.0 439.49
Thalassionemataceae + spores
P. barboi

49X-CC 450.97 5.0 450.97
Thalassionemataceae + spores
P. barboi

50X-CC 460.64 5.0 460.64
Thalassionemataceae + spores
P. barboi

51X-4, 70 466.00 5.0 466.00
Thalassionemataceae + spores


51X-4, 100 466.30 4.5 466.30
Thalassionemataceae + spores


51X-CC 469.88 4.5 469.88
Upw. + oceanic

<< FO R. praebergonii (3.0 Maa) 3.12 Mab
52X-CC 477.83 3.0 477.83
Thalassionemataceae + spores


53X-CC 485.73 3.0 485.73
Oceanic


54X-CC 496.68 2.5 496.68
Oceanic
P. barboi

55X-CC 503.54 2.5 503.54
Oceanic
P. barboi

56X-CC 513.78 2.0 513.78

P. barboi

57X-CC 527.14 1.5 527.14



58X-CC 535.19 2.0 535.19

P. barboi

59X-4, 40 542.60 2.0 542.60



59X-CC 544.08 0.0 544.08



60X-4, 100 552.80 2.5 552.80
Oceanic


60X-CC 555.48 0.0 555.48



61X-4, 85 562.35 3.5 562.35
Upw. + oceanic


61X-CC 564.94 1.5 564.94



62X-CC 576.57 2.0 576.57



63X-3, 120 580.40 3.5 580.40
Upw. + oceanic


63X-CC 585.69 1.0 585.69



64X-CC 594.56 1.0 594.56



65X-CC 604.64 0.0 604.64



Notes: For each sample, the dominant assemblage and the cold-water and biostratigraphic marker species are given. FO = first occurrence and LO = last occurrence. aAges adjusted to Berggren et al. (1995). bAges converted to Shackleton et al. (1995), as published in Wei (1994).