Table T10. Distribution of diatoms, Hole 1235A.
Core, section, interval (cm)
Depth (mbsf)
Depth (mcd)
Identification
Method
Abundance
Preservation
Actinocyclus curvatulus
Actinoptychus senarius
Aulacoseira granulata
Azpeitia nodulifera
Chaetoceros spp. (resting spores)
Delphineis spp.
Fragilariopsis doliolus
Hemidiscus cuneiformis
Paralia sulcata
Pseudonitzschia spp.
Roperia tesselata
Thalassionema nitzschioides
Thalassiosira spp.
Freshwater benthic
Freshwater species (planktonic)
Marine benthic species
Marine neritic species (other)
Marine pelagic species (other) COSM
Marine pelagic species (other) WW
Marine pelagic species (other) CW
Remarks
202-1235A-


























1H-1, 0-1 0.00 0.00 PAL S C G
R T F C F


R

F
T T C-A T R

1H-CC, 20-25 2.82 2.82 PAL S F M R

T F F




F R

F T



2H-2, 40 4.71 6.81 Toothpick S F-C M



F-C F





F T T
T



2H-4, 40 7.72 9.82 Toothpick S F-C P



F-C T

T


R T T
R



2H-CC, 23-28 12.50 14.60 PAL S R-F P-M
R

F F


T
R R T T F R-F T T

3H-3, 40 15.73 18.53 Toothpick S C M



C






F

R F



3H-CC, 38-43 22.54 25.34 PAL S C M-G



C R


R
T F

R F T


4H-3, 40 25.22 30.07 Toothpick S C G



C
T




F







4H-CC, 22-27 31.92 36.77 PAL S C-A M



C-A






R







5H-2, 40 33.20 39.14 Toothpick S C-A M


T C R




R R







5H-3, 40 34.70 40.64 Toothpick S C M-G



C T





F T T R



Very small specimens
5H-4, 40 36.20 42.14 Toothpick S F-C M



F R




T



T
T

5H-CC, 27-32 40.46 46.40 PAL S C M



C






R-F

T

T

6H-2, 40 42.69 50.67 Toothpick S F M

T
F-C







T T


T

6H-3, 40 44.21 52.19 Toothpick S C M



C






F-C
R





6H-4, 40 45.70 53.68 Toothpick S F-C M
T

C T





R







6H-CC, 43-48 50.12 58.10 PAL S R P



R






T







7H-3, 40 53.53 64.43 Toothpick S F M


R F






F

T T



7H-CC, 29-34 59.64 70.54 PAL S R P



R-F






R







8H-3, 40 63.06 75.68 Toothpick S C M


R C



R
F F
T R R



8H-CC, 20-25 69.03 81.65 PAL S R-F P
T

R-F



T

T







9H-3, 40 72.64 86.85 Toothpick S F P-M
R F
F R

R

R-F F
F R-F




9H-CC, 34-39 78.60 92.81 PAL S F-C M
R
R C F


R
F F

R




10H-2, 40 80.70 95.52 Toothpick S F-C M
R

F-C T




F R-F R R
T
R

10H-4, 40 83.70 98.52 Toothpick S R P



R-F T





T


R



10H-6, 40 86.70 101.52 Toothpick S F P T


F






T

T




10H-CC, 16-21 87.94 102.76 PAL S R P
T

R-F T




T T T T
T



11H-3, 40 91.70 107.27 Toothpick S F-C M


R C





R F

R F

T
11H-CC, 34-39 97.67 113.23 PAL S F P



F R




R F
T T R

T
12H-3, 40 101.20 118.85 Toothpick S F-C M R

R F-C F




F F

R-F


R
12H-CC, 42-47 107.81 125.46 PAL S F M-P



F



T
T R

T




13H-3, 40 110.65 130.63 Toothpick S C M

R
C





T C
R C F


Frequent Cocconeis
13H-CC, 34-39 116.91 136.89 PAL S F-C M-P


R F-C R





R-F

T


T
14H-2, 40 118.23 139.60 Toothpick S R-F P



R-F


T

T R







14H-3, 40 119.73 141.10 Toothpick S F-C M



F-C R




R F







14H-CC, 22-27 125.63 147.00 PAL S F M-P



F





R F


R



15H-3, 40 129.00 152.82 Toothpick S F-C M



F-C T


R

F-C


F


Increase in small sizes and Thalassirosira
15H-4, 40 130.50 154.32 Toothpick S A M


T A T




T C

T F


Nitzschia reinholdii (reworked)
15H-CC, 26-31 135.96 159.78 PAL S C M



C R-F





F







16H-2, 40 137.67 163.76 Toothpick S F M



R-F R-F








T T
T

16H-6, 40 143.16 169.25 Toothpick S F M
T

F T





R-F

T T



16H-CC, 22-27 145.31 171.40 PAL S R-F M



F T





F

T



Denticulopsis (reworked Miocene diatom)
17H-2, 40 147.20 177.45 Toothpick S C M
T

C






R-F


T
T

17H-3, 40 148.70 178.95 Toothpick S F-C M



F-C





F F
T





17H-4, 40 150.30 180.55 Toothpick S F M



F






R-F






Denticulopsis (reworked Miocene diatom)
17H-6, 40 153.10 183.35 Toothpick S C-A M



C-A R





F

T T



17H-CC, 18-23 154.87 185.12 PAL S C-A M



A






T



T


18H-2, 40 156.67 188.31 Toothpick S F G-M


T F T
T


T R


T



18H-4, 40 159.67 191.31 Toothpick S C-A M


R A






F


T
R

18H-6, 40 162.57 194.21 Toothpick S R-F P



R-F





T



R
T

18H-CC, 23-28 164.61 196.25 PAL S F G-M



F





R-F







Presence of >63-µm cells of Coscinodiscus
19H-2, 40 166.20 198.74 Toothpick S R P
T

R






T


T



19H-4, 40 169.20 201.74 Toothpick S F M-P



F



T
R R







19H-6, 40 172.20 204.74 Toothpick S T P



R





T








19H-CC, 30-35 174.23 206.77 PAL S F-C M



F-C






F


R
R

20H-2, 20 174.98 208.04 Toothpick S F M



F T




T F




T

20H-4, 40 175.89 208.95 Toothpick S F M



R-F


T

R F T T





20H-6, 40 178.88 211.94 Toothpick S F M
R

R


T

R F


T T


20H-CC, 1 181.33 214.39 PAL S F M-P

T
F





F R
T





Notes: PAL = paleontology sample. S = smear slide. Abundance: A = abundant, C = common, F = few, R = rare, T = trace. Preservation: G = good, M = moderate, P = poor. COSM = cosmopolitan forms, WW = warm-water forms, CW = cold-water forms.