Table T3. Diatom datums observed at Site 1101.
| Age (Ma) | Top depth (mbsf) |
Bottom depth (mbsf) |
||||
|---|---|---|---|---|---|---|
| Diatom events | A | B | C | Hole 1101A | ||
BKSA95 |
BKSA95 |
|||||
TC Hemidiscus karstenii |
0.19 |
<3H-2, 110 |
20.80 |
|||
BC Hemidiscus karstenii |
0.42 |
>3H-4, 110 |
23.80 |
|||
T Actinocyclus ingens |
0.64 |
0.64 |
0.65 |
<3H-4, 110 |
23.80 |
|
T Thalassiosira fasciculata |
1.7 |
0.7 |
6H-CC, 7H-1, 75 |
47.70 |
48.60 |
|
T Fragilariopsis barronii |
1.39 |
1.4 |
1.3 |
>9H-CC, <10H-3, 30 |
76.05 |
79.50 |
T Thalassiosira torokina |
1.85 |
1.8 |
<14H-4, 44 |
119.14 |
||
T Thalassiosira kolbei |
1.85 |
2 |
2 |
|||
T Actinocyclus karstenii |
1.78-2.9 |
<13H-6, 68 |
112.88 |
|||
T Thalassiosira vulnifica |
2.28 |
2.5 |
2.3 |
17X-CC, <18X-CC |
150.50 |
160.12 |
T Thalassiosira insigna |
2.57 |
2.63 |
2.6 |
19X-3, 70, <20X-3, 70 |
165.30 |
173.40 |
T Fragilariopsis interfrigidaria |
2.67 |
2.63 |
18X-CC, 19X-2, 70 |
160.12 |
162.30 |
|
T Thalassiosira striata |
2.92-3.4 |
>21X-3, 58, <21X-4, 40 |
182.88 |
184.20 |
||
B Thalassiosira vulnifica |
3.17 |
3.26 |
>21X-3, 58, <21X-4, 40 |
182.88 |
184.20 |
|
B Thalassiosira insigna |
3.4 |
3.4 |
>23X-1, 29, <23X-CC |
198.79 |
208.23 |
|
| Base of hole = 217.7 mbsf | ||||||
Notes: Species listed in bold print are zonal boundary markers. Three age columns are shown: (A) Harwood and Maruyama (1992); (B) Gersonde, Hodell, Blum, et al. (1999, Leg 177); and (C) Gersonde and Bárcena (1998). The chrons were assigned by Harwood and Maruyama (1992). T = top/last occurrence datum, B = base/first occurrence datum, BC = base common/first common occurrence datum, TC = top common/last common occurrence datum.