Table T4. Biostratigraphically useful diatom datums for Site 1095. (Continued on next page.)
| Diatom
datums (published ages) |
ABKSA95 | BBKSA95 | C |
Chrons | Hole 1095A | Top depth (mbsf) |
Bottom depth (mbsf) |
|---|---|---|---|---|---|---|---|
TC Hemidiscus karstenii |
0.19 |
C1n1 |
|||||
BC Hemidiscus karstenii |
0.42 |
-- |
|||||
T Actinocyclus ingens |
0.64 |
0.64 |
0.65 |
C1n1 |
1H-CC<, <2H-3, 90 |
5.67 |
9.80 |
T Thalassiosira elliptipora |
0.68 |
0.7 |
1.04-1.11 |
C1n1 |
2H-3, 90<, <3H-6, 94 |
9.80 |
17.72 |
T Thalassiosira fasciculata |
1.7 |
0.7 |
C1r.1r |
-- |
|||
T Fragilariopsis barronii |
1.39 |
1.4 |
1.3 |
C1r2 |
2H-3, 90<, <3H-6, 94 |
9.80 |
17.72 |
T Thalassiosira torokina |
1.85 |
1.8 |
C2n1 |
-- |
|||
T Thalassiosira kolbei |
1.85 |
2 |
2 |
C2n1 |
|||
T Thalassiosira complicata |
3.4 |
2.5 |
-- |
||||
T Thalassiosira inura |
1.85 |
2.5 |
C2n1 |
8H-CC<, <9H-3, 130 |
68.90 |
72.60 |
|
T Thalassiosira vulnifica |
2.28 |
2.5 |
2.3 |
C2r3 |
-- |
||
T Fragilariopsis interfrigidaria |
2.67 |
2.63 |
C2An1 |
9H-CC< |
77.80 |
||
T Thalassiosira insigna |
2.57 |
2.63 |
2.6 |
C2r3 |
|||
B Thalassiosira vulnifica |
3.17 |
3.26 |
C2An2 |
Base of hole = 87.3 mbsf | |||
B Fragilariopsis interfrigidaria |
3.8 |
3.8 |
C2Ar3 |
||||
B Thalassiosira striata |
4.48 |
C3n2 |
|||||
B Fragilariopsis barronii |
4.48 |
4.44 |
C3n2 |
||||
B Thalassiosira complicata |
4.62 |
4.44 |
C3n.2r |
||||
B Thalassiosira inura |
4.85 |
4.92 |
C3n.3r |
||||
B Fragilariopsis praeinterfrigidari |
4.85 |
5.3 |
C3n.3r |
||||
B Thalassiosira oestrupii |
5.62 |
5.56 |
C3r4 |
||||
T Nitzschia donahuensis |
5.89 |
C3An1 |
|||||
T Actinocyclus ingens var ovalis |
6.27 |
||||||
T Hemidiscus ovalis |
6.32 |
C4An1 |
|||||
B Thalassiosira oliverana |
6.42 |
6.42 |
C3An2 |
||||
B Actinocyclus ingens var ovalis |
8.68 |
||||||
B Hemidiscus ovalis |
8.68 |
C4An1 |
|||||
B Cosmiodiscus intersectus |
8.68 |
||||||
B Thalassiosira oliverana var sparsa |
8.68 |
||||||
B Thalassiosira torokina |
8.92 |
9.01 |
|||||
T Denticulopsis crassa |
9.23 |
C4Ar.1n |
|||||
B Nitzschia donahuensis |
9.63 |
C4An3 |
|||||
B Asteromphalus kennettii |
10.23 |
C5n1 |
|||||
B Denticulopsis crassa |
10.29 |
||||||
Notes: Species listed in bold print are used as 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). Holes 1095A, 1095B, and 1095D are represented in the table with Hole 1095C missing, as its entire depth consisted of one core. Datums occur in the cores within the interval listed for each species. T = top/last occurrence datum, B = base/first occurrence datum, BC = base common/first common occurrence datum, TC = top common/last common occurrence datum. BKSA = Berggren et al. (1995). -- = not observed; gray boxes = either an interval drilled but not cored, or an interval not drilled.