Table
T3. Ages of calcareous nannofossil datum levels
used on Leg 182.
B
Acme Emiliania huxleyi
0.085
2
B Emiliania
huxleyi
CN15
0.248
2
T Pseudoemiliania
lacunosa
CN14b
0.408
2
B Gephyrocapsa
parallela
0.94
2
Reentrance
Gephyrocapsa spp. (medium)
CN14a?
0.97
2
T Gephyrocapsa
spp. (large)
1.18
2
B Gephyrocapsa
spp. (large)
1.40
2
T
Helicosphaera sellii
1.41
2
T Calcidiscus
macintyrei
1.65
2
B Gephyrocapsa
caribbeanica
CN13b?
1.71
2
Pleistocene/Pliocene
boundary
1.71
T Discoaster
brouweri
CN13a
1.95
2
B
Acme Discoaster triradiatus
2.00
2
T Discoaster
pentaradiatus
CN12d
2.36
2
T Discoaster
surculus
CN12c
2.51
2
T Discoaster
tamalis
CN12b
2.82
2
T Sphenolithus
spp.
CN12a
3.62
2
T Reticulofenestra
pseudoumbilicus
CN12a
3.83
2
T Amaurolithus
spp.
CN11
4.50
2
T Ceratolithus
acutus
5.04
3
B Ceratolithus
rugosus
CN10c
5.05
2
B Ceratolithus
acutus
CN10b
5.09
2
T Triquetrorhabdulus
rugosus
5.23
2
Pliocene/Miocene
boundary
5.30
T Discoaster
quinqueramus
CN10a
5.6
1
T Amaurolithus
amplificus
5.9
1
B Amaurolithus
amplificus
6.6
1
T
Paracme R. pseudoumbilicus
6.8
4
B Amaurolithus
primus
CN9b
7.2
1
T
Discoaster loeblichii
7.4
1
T Minylitha
convalis
7.8
1
B Discoaster
berggrenii
CN9a
8.6
1
B Discoaster
loeblichii
8.7
1
B
Paracme R. pseudoumbilicus
8.8
4
T Discoaster
bollii
9.1
1
T Catinaster
calyculus
9.36
3
T Discoaster
hamatus
CN8a
9.4
1
B Minylitha
convallis
9.5
1
B Discoaster
neohamatus
9.6
4
B Discoaster
hamatus
CN7
10.7
1
T Coccolithus
miopelagicus
11.0
3
B Catinaster
coalitus
CN6
11.3
1
T Discoaster
kugleri
11.5
1
B Discoaster
kugleri
11.8
1
T Coronocyclus
nitescens
12.1
4
B Calcidiscus
macintyrei >11um
12.3
4
B Triquetrorhabdulus
rugosus
13.2
1
T Calcidiscus
premacintyrei
12.7
4
T Discoaster
signus
12.7
4
Tc Cyclicargolithus
floridanus
13.2
4
T Sphenolithus
heteromorphus
CN5a
13.6
1
T Helicosphaera
ampliaperta
CN4
15.6
1
B Discoaster
signus
16.2
4
T
Abundant Discoaster deflandrei
16.2
4
B Calcidiscus
premacintyrei
17.4
5
B Sphenolithus
heteromorphus
CN3
18.2
1
T Sphenolithus
belemnos
18.3
1
B Sphenolithus
belemnos
CN2
19.2
1
T Triquetrorhabdulus
carinatus
23.1
1
T Triquetrorhabdulus
serratus
23.2
1
T Sphenolithus
umbrellus
23.6
1
T Sphenolithus
capricornutus
23.7
1
B Discoaster
druggi
CN1c
23.3
6
T Sphenolithus
delphix
23.8
1
Miocene/Oligocene
boundary
23.8
T Dictyococcites
bisectus
CN1c
23.9
1
B Sphenolithus
delphix
24.3
1
T Zygrhablithus
bijugatus
24.5
1
T Sphenolithus
ciperoensis
CN1a
24.75
1
T Sphenolithus
distentus
CP19b
27.5
1
T Sphenolithus
predistentus
27.5
1
T Sphenolithus
pseudoradians
29.1
1
B Sphenolithus
ciperoensis
CP19a
29.9
1
B Sphenolithus
distentus
CP18
31.5-33.1
1
T Reticulofenestra
umbilicus
CP17
32.3
1
T Coccolithus
formosus
CP16c
32.8
1
T Chiasmolithus
oamaruensis
33.7
1
Oligocene/Eocene
boundary
33.7
T Discoaster
saipanensis
CP16a
34.2
1
T Discoaster
barbadiensis
CP16a
34.3
1
T Cribrocentrum
reticulatum
35.0
1
B Isthmolithus
recurvus
36.0
1
T Calcidiscus
protoannulus
36.8
7
B Chiasmolithus
oamaruensis
CP15
37.0
1
T Chiasmolithus
grandis
CP15
37.1
1
B Dictyococcites
bisecta
38.0
1
T Chiasmolithus
solitus
CP14b
40.4
1
B Dictyococcites
hesslandii
41.8
7
T Nannotetrina
fulgens
43.1
1
T Blackites
gladius
43.4
1
B Reticulofenestra
umbilicus
CP14a
43.7
1
T Chiasmolithus
gigas
CP13c
44.5
1
B Chiasmolithus
gigas
CP13b
46.1
1
B Nannotetrina
fulgens
CP13a
47.3
1
T Discoaster
lodoensis
47.9
1
B Rhabdosphaera
inflata
48.5
1
B Nannotetrina
spp.
49.2
8
B Discoaster
sublodoensis
CP12
49.7
1
T Tribrachiatus
orthostylus
50.6
1
B Discoaster
lodoensis
CP10
52.85
1
T Sphenolithus
radians
53.1
1
T Tribrachiatus
contortus
53.6
1
B
Tribrachiatus orthostylus
53.6
1
B Discoaster
diastypus
CP9a
53.9
8
T Ericsonia
robusta
54.0
8
B Tribrachiatus
contortus
CP9a
54.3
1
Eocene/Paleocene
boundary
54.5
B Tribrachiatus
(Rhomboaster) bramlettei
55.0
8
B Rhomboaster
spp.
55.1
8
T Fasciculithus
tympaniformis
55.33
1
B Camplyosphaera
eodela
CP8b
55.5
1
B Discoaster
multiradiatus
CP8a
56.2
1
B Discoaster
okadai
56.8
1
B Discoaster
nobilis
CP7
56.9
1
B Heliolithus
riedelii
57.3
1
T Heliolithus
kleinpellii
56.6
8
B Discoaster
mohlerii
CP6
57.5
1
B Sphenolithus
anarrhopus
58.4
1
T Chiasmolithus
danicus
57.5
9
B Heliolithus
kleinpellii
CP5
58.4
1
B Heliolithus
cantabriae
58.2
8
T Fasciculithus
pileatus
58.6
8
T Cruciplacolithus
tenuis
58.6
9
B Fasciculithus
spp.
59.2
8
B Sphenolithus
primus
60.6
1
B Chiasmolithus
bidens
60.7
1
B Ellipsolithus
macellus
CP3
62.2
1
B Chiasmolithus
danicus
CP2
63.8
1
B Cruciplacolithus
tenuis
CP1b
64.5
1
B Cruciplacolithus
primus
64.8
1
B Biantholithus
sparsus
65.0
1
T
Cretaceous taxa
CP1a
65.0
1
Tertiary/Cretaceous
boundary
65.0
B Micula
prinsii
66.0
10
B Nephrolithus
frequens (low latitude)
67.2
10
B Micula
murus
68.5
10
T Reinhardtites
levis
69.4
10
T Quadrum
trifidum
71.3
10
Maastrichtian/Campanian
boundary
71.3
T Tranolithus
phacelosus
71.6
10
T Aspidolithus
parcus
74.6
10
T Eiffellithus
eximius
75.3
10
T Lithastrinus
grillii
75.1
10
B Quadrum
trifidum
76.1
10
B Quadrum
sissinghii
77.1
10
B Ceratolithoides
aculeus
78.5
10
T Bukryaster
hayii
79.8
10
T Marthasterites
furcatus
80.6
10
B Ceratolithoides
verbeekii
82.0
10
B Aspidolithus
parcus constrictus
83.5
10
Campanian/Santonian
boundary
83.5
B Calculites
obscurus
83.8
10
B Lucianorhabdus
cayeuxii
84.8
10
T Lithastrinus
septenarius
84.9
10
B Lithastrinus
grillii
85.8
10
Santonian/Coniacian
boundary
85.8
B
Reinhardtites anthophorus
85.8
10
B Micula
decussata
87.2
10
Coniacian/Turonian
boundary
89.0
B Marthasterites
furcatus
89.3
10
B Lucianorhabdus
maleformis
91.0
10
B Eiffellithus
eximius
91.0
10
B Quadrum
gartnerii
93.5
10
Cenomanian/Turonian
boundary
93.5
T Corollithion
kennedyi
93.9
10
T Rhagodiscus
asper
93.9
10
T Axopodorhabdus
albianus
93.9
10
T Microstaurus
chiastius
94.4
10
B Microrhabdulus
decoratus
95.2
10
B Lithraphidites
acutus
95.2
10
B Corollithion
kennedyi
97.4
10
Albian/Cenomanian
boundary
98.9
T Hayesites
albiensis
99.0
10
T Rucinolithus
irregularis
99.0
10
B Eiffellithus
turriseiffelii
101.7
10
B Eiffelithus
spp. (small)
103.8
10
B Axopodorhabdus
albianus
106.5
10
B Tranolithus
phacelosus
106.5
10
B Cribrosphaerella
ehrenbergii (sensu Erba)
110.3
10
Aptian/Albian
boundary
112.2
B Prediscosphaera
columnata (<5 um)
112.5
10
T Assipetra
intracretacea
113.0
10
B Hayesites
albiensis
114.0
10
T Micrantholithus
hoschulzii
114.2
10
T Nannoconus
st. steinmanii
114.2
10
B Braarudosphaera
africana
118.2
10
B Stoverius
achylosum
118.2
10
B Eprolithus
floralis
119.0
10
B Rhagodiscus
angustus
119.9
10
T
nannoconid paracme
120.5
10
Barremian/Aptian
boundary
121.0
B Rucinolithus
irregularis
121.1
10
B Flabellites
oblongus
121.1
10
Notes: B = base, T = top. References: 1 = Berggren et al. (1995a); 2 = Sigurdsson, Leckie, Acton, et al. (1997); 3 = Curry, Shackleton, Richter, et al. (1995); 4 = Raffi and Flores, 1995; 5 = Gartner, 1992; 6 = Berggren et al. (1985b); 7 = Backman (1987); 8 = Backman (1986). References 3 through 9 have been calibrated to the time scale of Berggren et al. (1995a, 1995b).