Table T12. Distribution of diatoms, Hole 1241A.
Core, section, interval (cm)
Depth (mbsf)
Depth (mcd)
Identification
Method
Abundance
Preservation
Actinocyclus ellipticus
Actinocyclus ellipticus v. lanceolata
Actinocyclus moronensis
Actinocyclus spp.
Actinoptychus senarius
Asteromphalus spp.
Azpeitia nodulifera
Chaetoceros spp. (resting spores)
Coscinodiscus spp.
Denticulopsis simonsenii s.l.
Fragilariopsis doliolus
Hemidiscus cuneiformis
Nitzschia cylindrica
Nitzschia fossilis
Nitzschia jouseae
Nitzschia marina
Nitzschia miocenica
Nitzschia porteri
Nitzschia reinholdii
Rhizosolenia matuyamai
Rhizosolenia praebergonii s.s.
Rhizosolenia spp.
Rossiella praepaleacea s.l.
Rossiella paleacea s.l.
Stephanopyxis spp.
Thalassionema spp.
Thalassiosira burckliana
Thalassiosira convexa
Thalassiosira convexa v. aspinosa
Thalassiosira miocenica
202-1241A-



































Mudline 0.00 0.00 PAL S F-C P





F


F R


F




R


F



1H-CC, 1 3.79 4.10 PAL S R P-M














T








T



2H-CC, 1 13.52 14.48 PAL S F M


T


R

F

T
R




R


F



3H-CC, 1 23.00 24.76 PAL S F M









R-F R


R


R-F
R-F







4H-CC, 1 32.56 36.51 PAL S F P





F


T

T
R-F




R


F



5H-CC, 1 42.21 46.94 PAL S F P



R
R-F


T R
F
F

F

R


F



6H-CC, 33 51.95 58.12 PAL S F P





R



R R R R R-F

R
R-F R


F



7H-CC, 10 61.28 68.31 PAL S F P



R
F





F R F

R
F

R
F
F R
8H-CC, 32 71.00 79.69 PAL S C P-M



R
F



R

R-F F

F

F


F-C
F

9H-CC, 0 80.21 89.85 PAL S F P-M


T

F



F
R-F R





R
F
F
T F
10H-CC, 35 89.96 100.68 PAL S F P-M


R

F
T




F F

F

F


F
F R
11H-CC, 13 99.37 111.17 PAL S F P




R F R


R


R

F

R
T
F

F
12H-CC, 14 108.74 121.94 PAL S R-F P





R-F





R R









R-F



13H-CC, 13 118.07 131.66 PAL S R P





R







R

R










14H-CC, 18 127.84 142.01 PAL S F P-M T



T F




R-F R-F
R-F T-R
R-F





F



15H-CC, 9 137.35 152.07 PAL S R-F P
T



R-F




T-R




R-F

F


R-F



16H-CC, 36 147.07 163.32 PAL S F M



T T T R


T R R
T R-F
T

F R-F

T-R



17H-CC, 20 156.52 173.36 PAL S F M F


T T F R T

R-F R R
T

R

R T T
F



18H-CC, 21 165.83 184.07 PAL S F M T




F T T

T
R
T





T

C



19H-CC, 21 175.52 194.80 PAL S C M R F

T T F R


T



T T


T R T
C-A

T R
20H-CC, 35 185.09 205.97 PAL S F P T




F








R-F







R


T
21H-CC, 26 194.56 216.69 PAL S C-A M R


R T F R


F


R-F F
T

R





R-F F
22H-CC, 29 203.91 227.20 PAL S C-A M F R
T T T F R


F
R

F
R

R


F



23H-CC, 33 213.60 239.00 PAL S C M R-F




T



T T

T R
T

F R

T-R



24H-CC, 8 222.78 249.93 PAL S C M F









F


T F



R-F
F
F-C



25H-CC, 22 232.53 261.37 PAL S C-A M R


T
R-F



R-F
T







F

R



26H-CC, 20 241.90 271.93 PAL S F-C M




T F R


R T R

T




T R
F



27H-CC, 1 251.30 282.36 PAL S A P-M T T R

T F
T


C-A T
T




T R T
C-A



28H-CC, 30 260.90 293.35 PAL S F P





R-F

T
R
R






F


F



29H-CC, 1 269.95 303.15 PAL S F P


T

F

R


R


F


R


F-C R


30H-CC, 24 279.99 314.33 PAL S F P T

T

R
R



T






R
R-F
F F


31H-CC, 24 289.34 324.62 PAL S F-C M R-F



T R R R-F











T
F R-F F



32H-CC, 22 298.82 337.16 PAL S C M R


R
R R R

R








F T
R C



33H-CC, 23 308.17 349.56 PAL S F-C M F



T R
R-F F-C
R-F








T
R
F-C



34H-CC, 21 317.73 360.36 PAL S C M





R
T F










R
F
F-C



35X-CC, 40 323.98 367.43 PAL S F-C M F


R



F










F


F



36X-CC, 29 332.93 377.55 PAL S F-C M T




T T T F












T
F



 
Core, section, interval (cm)
Depth (mbsf)
Depth (mcd)
Identification
Method
Abundance
Preservation
Thalassiosira oestrupii
Thalassiosira praeconvexa
Thalassiosira yabei
Thalassiosira spp.
Thalassiothrix spp.
Remarks
202-1241A-











Mudline 0.00 0.00 PAL S F-C P F-C


F
1H-CC, 1 3.79 4.10 PAL S R P-M T


T Ethmodiscus fragments
2H-CC, 1 13.52 14.48 PAL S F M F


R Presence of Grammatophora
3H-CC, 1 23.00 24.76 PAL S F M


R-F
Ethmodiscus fragments
4H-CC, 1 32.56 36.51 PAL S F P R-F

F R Ethmodiscus fragments
5H-CC, 1 42.21 46.94 PAL S F P F

F F Ethmodiscus fragments
6H-CC, 33 51.95 58.12 PAL S F P R

F F Ethmodiscus fragments
7H-CC, 10 61.28 68.31 PAL S F P F

F F Ethmodiscus fragments/Plagiogramma
8H-CC, 32 71.00 79.69 PAL S C P-M F
T F-C

9H-CC, 0 80.21 89.85 PAL S F P-M



F Ethmodiscus fragments
10H-CC, 35 89.96 100.68 PAL S F P-M


F R-F Ethmodiscus fragments
11H-CC, 13 99.37 111.17 PAL S F P


F F Ethmodiscus fragments
12H-CC, 14 108.74 121.94 PAL S R-F P




Ethmodiscus fragments
13H-CC, 13 118.07 131.66 PAL S R P


R R Ethmodiscus fragments
14H-CC, 18 127.84 142.01 PAL S F P-M


R R-F Ethmodiscus fragments
15H-CC, 9 137.35 152.07 PAL S R-F P


R R-F
16H-CC, 36 147.07 163.32 PAL S F M
T
T F Ethmodiscus fragments
17H-CC, 20 156.52 173.36 PAL S F M


R-F F-C Presence of Grammatophora
18H-CC, 21 165.83 184.07 PAL S F M



F Ethmodiscus fragments
19H-CC, 21 175.52 194.80 PAL S C M



C-A
20H-CC, 35 185.09 205.97 PAL S F P



F Presence of Pinnularia
21H-CC, 26 194.56 216.69 PAL S C-A M
T

C-A Presence of Diploneis
22H-CC, 29 203.91 227.20 PAL S C-A M
T

C Presence of Diploneis
23H-CC, 33 213.60 239.00 PAL S C M



F
24H-CC, 8 222.78 249.93 PAL S C M
T
T F-C
25H-CC, 22 232.53 261.37 PAL S C-A M


R C Ethmodiscus fragments
26H-CC, 20 241.90 271.93 PAL S F-C M



T
27H-CC, 1 251.30 282.36 PAL S A P-M


F C-A
28H-CC, 30 260.90 293.35 PAL S F P



F Presence of Cocconeis, Paralia sulcata, and Grammatophora
29H-CC, 1 269.95 303.15 PAL S F P


R F
30H-CC, 24 279.99 314.33 PAL S F P


R-F F Presence of Plagiogramma
31H-CC, 24 289.34 324.62 PAL S F-C M

T R F-C Presence of Cocconeis
32H-CC, 22 298.82 337.16 PAL S C M

R F C
33H-CC, 23 308.17 349.56 PAL S F-C M


F C Thrix-Thema fragments dominated/Ethmodiscus fragments
34H-CC, 21 317.73 360.36 PAL S C M

F R F Thrix-Thema fragments dominated/Ethmodiscus fragments
35X-CC, 40 323.98 367.43 PAL S F-C M

T F C Thrix-Thema fragments dominated
36X-CC, 29 332.93 377.55 PAL S F-C M

T R-F F Thrix-Thema fragments dominated
 
Core, section, interval (cm)
Depth (mbsf)
Depth (mcd)
Identification
Method
Abundance
Preservation
Actinocyclus ellipticus
Actinocyclus ellipticus v. lanceolata
Actinocyclus moronensis
Actinocyclus spp.
Actinoptychus senarius
Asteromphalus spp.
Azpeitia nodulifera
Chaetoceros spp. (resting spores)
Coscinodiscus spp.
Denticulopsis simonsenii s.l.
Fragilariopsis doliolus
Hemidiscus cuneiforms
Nitzschia cylindrica
Nitzschia fossilis
Nitzschia jouseae
Nitzschia marina
Nitzschia miocenica
Nitzschia porteri
Nitzschia reinholdii
Rhizosolenia matuyamai
Rhizosolenia praebergonii s.s.
Rhizosolenia spp.
Rossiella praepaleacea s.l.
Rossiella paleacea s.l.
Stephanopyxis spp.
Thalassionema spp.
Thalassiosira burckliana
Thalassiosira convexa
Thalassiosira convexa v. aspinosa
Thalassiosira miocenica
37X-CC, 40 342.72 388.60 PAL S C-A M R




R

C
T








R-F T R-F
C



38X-CC, 19 346.13 393.25 PAL S F-C P





R R
F










R


F



39X-CC, 16 360.85 409.21 PAL S F-C P-M

R


T

F-C










T
F R-F F-C



40X-CC, 30 371.47 421.09 PAL S A P-M T
T


F

R




T
F


R R R





41X-CC, 26 377.99 428.86 PAL S C P-M








F-C










F


F-C



42X-CC, 1 390.49 442.63 PAL S F P








R














R



43X-CC, 0 393.29 446.67 PAL S T P





























 
Core, section, interval (cm)
Depth (mbsf)
Depth (mcd)
ID
Method
Abundance
Preservation
Thalassiosira oestrupii
Thalassiosira praeconvexa
Thalassiosira yabei
Thalassiosira spp.
Thalassiothrix spp.
Remarks
37X-CC, 40 342.72 388.60 PAL S C-A M

R T C
38X-CC, 19 346.13 393.25 PAL S F-C P

R
F Presence of Paralia sulcata
39X-CC, 16 360.85 409.21 PAL S F-C P-M

R R T Presence of Diploneis
40X-CC, 30 371.47 421.09 PAL S A P-M

R T

41X-CC, 26 377.99 428.86 PAL S C P-M

R T F
42X-CC, 1 390.49 442.63 PAL S F P

R
R Ethmodiscus fragments
43X-CC, 0 393.29 446.67 PAL S T P


T T

Notes: PAL = paleontology sample. S = smear slide. Abundance: A = abundant, C = common, F = few, R = rare, T = trace. Preservation: M = moderate, P = poor.