Table T13. Distribution of diatoms, Hole 1242A.
Core, section, interval (cm)
Depth (mbsf)
Depth (mcd)
Identification
Method
Abundance
Preservation
Actinocyclus ellipticus
Actinocyclus spp.
Actinoptychus senarius
Asteromphalus spp.
Azpeitia nodulifera
Chaetoceros spp. (resting spores)
Coscinodiscus spp.
Denticulopsis simonsenii s.l.
Fragilariopsis doliolus
Hemidiscus cuneiformis
Nitzschia fossilis
Nitzschia marina
Nitzschia reinholdii
Rhizosolenia matuyamai
Rhizosolenia spp.
Rossiella paleacea s.l.
Stephanopyxis spp.
Thalassionema spp.
Thalassiosira oestrupii
Thalassiosira yabei
Thalassiosira spp.
Thalassiothrix spp.
Remarks
202-1242A




























Mudline 0.00 0.00 PAL S F-C M-G

R R F R-F

F

F




F F
F R Cyclotella (F)
1H-CC, 16 6.65 6.66 PAL S R P-M



T











T


T Cyclotella (R)
2H-CC, 16 16.46 17.87 PAL S T P



T

















3H-CC, 20 26.12 28.91 PAL S T P



T











T




4H-CC, 33 35.65 40.00 PAL S T P





















Only fragments
5H-CC, 20 45.18 49.52 PAL S T P




















T
6H-CC, 29 54.65 59.50 PAL S F-C M

T T F F R
F R
R




F F
F T-R Presence of Diploneis, Fragilaria construens
7H-CC, 1 64.38 69.48 PAL S F-C M



F R-F

F

F

R

F F
R-F

8H-CC, 37 73.69 80.13 PAL S F M

T T T R-F

F T T R R-F
R

F

T
Ethmodiscus fragments, Cyclotella
9H-CC, 19 83.08 88.94 PAL S F M
T

T


R T R T

R


F
F T Presence of Diploneis and Cocconeis
10H-CC, 36 92.71 99.20 PAL S F M



R R-F

F

T T
R

F F
T
Ethmodiscus fragments, Cocconeis
11H-CC, 0 101.69 109.39 PAL S F M


T R F T T R
T
T
T

R R
T R Ethmodiscus fragments, Cyclotella
12H-CC, 42 111.75 120.00 PAL S F M T T

T R R-F
R T R T

T

R R
F
Ethmodiscus fragments, Cocconeis, Diploneis
13H-CC, 26 121.15 130.39 PAL S F M
T

T F R
F
T

R R

T F

T Ethmodiscus fragments, Cyclotella
14H-CC, 33 130.65 141.20 PAL S R P







T
T T
T R

R T

R Etmosdiscus fragments
15H-CC, 20 139.80 151.44 PAL S T P




















T
16H-CC, 45 149.83 164.33 PAL S T P




T














T
17H-CC, 27 159.03 174.87 PAL S T P




T










T
T
T Presence of Diploneis
18H-CC, 68 168.72 186.81 PAL S R P



R T
T T

T

T

R

T R Ethmodiscus fragments, Aulacoseira
19H-CC, 0 175.95 196.37 PAL S T P










T

T





T Ethmodiscus fragments, Aulacoseira, Diploneis
20X-CC, 24 183.95 204.34 PAL S T P



T T




T T







T Presence of Diploneis
21X-CC, 28 193.53 215.23 PAL S R P



T
T
T
T T T



T

T T Ethmodiscus fragments
22X-CC, 27 203.24 227.55 PAL S T P




















T
23X-CC, 20 212.79 237.50 PAL S T P






















24X-CC, 29 222.36 249.92 PAL S T P






















25X-CC, 28 231.89 260.35 PAL S T P






















26X-CC, 0 241.08 272.53 PAL S T P






















27X-CC, 30 251.00 280.89 PAL S T P















T T




27X-CC, 30 251.00 280.89 PAL S F P T T

T

T






T T F
R
F Presence of Actinocyclus ingens, Craspedodiscus coscinodiscus

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