Table T10.
Significant radiolarian datum levels at Site 1123.
Events
selected for Site 1123,
Leg 181Stage
Age
(Ma)Core,
section,
interval (cm)Depth
(mbsf)Depth
(mcd)References
LO Stylatractus universus
Pleistocene
0.46
1123A-3H-CC
23.21
23.07
Caulet, 1991
LO Axoprunum angelinum
Pleistocene
1123A-4H-CC
34.7
32.26
FO Theocorythium
trachelium
early Pleistocene
1.6-1.7
1123A-7H-CC
63.15
65.85
Alexandrovich, 1989
LO Eucyrtidium
calvertense
late Pliocene
1.92
1123A-7H-CC
63.15
65.85
Lazarus, 1992
LO Theocorythium vetulum
early Pleistocene
1.2-1.3
1123A-8H-CC
72.02
75.87
Alexandrovich, 1989
LO Anthocyrtidium
angulare
1123A-9H-CC
82.33
86.82
LO Sphaeropyle langii
1123A-9H-CC
82.23
86.82
LO Lamprocyrtis
heteroporos
Pliocene/Pleistocene
1.8
1123A-10H-CC
91.88
97.83
Morley and Nigrini, 1995
LO Pterocanium prismatium
early Pleistocene
1.7
1123A-11H-CC
101.1
107.32
Johnson, et al., 1989
LCO Stichocorys group
early Pleistocene
4.2
1123A-12H-CC
110.76
117.42
Motoyama and Maruyama, 1998
FO Cycladophora davisiana
davisiana
late Pliocene
2.91-3.08
1123A-13H-CC
119.7
127.91
Morley and Nigrini, 1995
LO Stichocorys peregrina
late Pliocene
<3.0
1123A-15H-CC
139.5
149.38
Motoyama and Maruyama, 1998
LO Sphaeropyle robusta
1123B-16H-6, 123-126
145.13
FO Amphirhopalum ypsilon
early Pliocene
3.9
1123B-16H-CC
145.76
157.78
Johnson, et al., 1989
LO Lychnodictyum
audax
early Pliocene
3.7
1123B-17H-CC
155.63
167.57
Johnson, et al., 1989
LO Dictyophimus
splendens
earliest Pliocene
5.0-5.2
1123B-19X-CC
172.31
184.25
Morley and Nigrini, 1995
FO Sphaeropyle langii
late Miocene
6.0-6.2
1123B-21X-CC
191.27
203.31
Morley and Nigrini, 1995
LO Amphymenium
amphistylium
1123B-21X-CC
191.27
203.31
Morley and Nigrini, 1995
LO Lychnocanoma
parallelipes
latest Miocene
5.6
1123B-21X-CC
191.27
203.31
Motoyama and Maruyama, 1998
FO Stylacontarium
aquilonium
late Miocene
7.88
1123B-22X-CC
201.37
213.41
Morley and Nigrini, 1995
LO Didymocyrtis
penultima
1123B-25X-CC
230
Motoyama and Maruyama, 1998
FO Dictyophimus
splendens
1123B-27X-CC
249.32
FO Lychnocanoma
parallelipes
late Miocene
6.8-7.3
1123B-29X-CC
268.5
280.53
Motoyama and Maruyama, 1998
RI Acme Stichocorys
peregrina
late Miocene
6.8-7.3
1123B-29X-CC
268.5
280.53
Motoyama and Maruyama, 1998
FO Didymocyrtis penultima
1123B-30X-CC
278
289.94
Evolutionary transition
S. delmontensis 
S. peregrina
late Miocene
7.7
1123B-32X-CC
296.3
308.24
Morley and Nigrini, 1995
LO Didymocyrtis
antepenultima
late Miocene
8.2
1123B-32X-CC
296.3
308.24
Motoyama and Maruyama, 1998
FO Didymocyrtis
antepenultima
late Miocene
9.7
1123B-35X-CC
326
337.94
Johnson, et al., 1989
LO Cyrtocapsella japonica
late Miocene
9.9
1123B-41X-CC
382.2
394.14
Motoyama and Maruyama, 1998
RI Acme Cyrtocapsella
japonica
late Miocene
10.2
1123B-42X-CC
388.4
400.34
Sakai and Aita, 1994
LO Didymocyrtis laticonus
1123B-42X-CC
388.4
400.34
RD Cyrtocapsella
tetrapera
middle Miocene
12.6
1123B-44X-CC
408.3
420.24
Motoyama and Maruyama, 1998
LO Eucyrtidium yatsuoense
1123B-44X-CC
408.3
420.24
LO Cyrtocapsella
cornuta
late middle Miocene
11.6-12.3
1123B-45X-CC
416.56
Motoyama and Maruyama, 1998
FO Sphaeropyle robusta
1123B-47X-CC
437
LO Theocorys spongoconum
1123B-47X-CC
437
LO Eucyrtidium sp.
B of Sakai
1123C-19X-CC
498.1
507.42
FO Eucyrtidium
punctatum
early Miocene
17.02
1123C-19X-CC
498.1
507.42
Lazarus, 1992
FO Cyrtocapsella
tetrapera
Miocene/Oligocene
23.62
1123C-27X-CC
574.96
584.28
Sanfilippo and Nigrini, 1998
LO Eucyrtidium spinosum
early Oligocene
31.7-31.9
1123C-31X-CC
611.1
620.51
Takemura and Ling, 1997
FO Eucyrtidium antiquum
early Oligocene
32.8-33.1
1123C-31X-CC
611.1
620.51
Takemura and Ling, 1997
FO Eucyrtidium spinosum
middle to late Eocene
36.7-38.1
1123C-32X-CC
619.65
Takemura and Ling, 1997