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Table 1. Distribution of Bolboforma in the Pliocene sediments of Hole 982B.

Core, section,
interval (cm)

 Depth (mbsf)
Number of samples
Bolboforma (abundances)
B. costa. costairregularis
B. elegans
B. hispida
B. alata
B. stella
B. costa. variabilis
B. carina
B. carinaspinosa
B. tenuis
B. sphaerica
B. cyst
Bolboforma Zone/Subzone
Series

162-982B-

  













upper B. costairregularis

upper Pliocene

7H-5, 31

59.31

R

T










7H-5, 71, thr.*

59.71

2

B











7H-6, 18-20

60.68

R

R










7H-6, 21, thr.*

60.71

3

B











8H-1, 142-144

63.92

R

R










8H-2, 142-144

65.42

R

R










8H-3, 142-144

66.92

C

C










8H-4,142-144

68.42

R

R

T









8H-5, 140-142

69.9

C

C









8H-6, 140-142

71.4

R

R









9H-1, 84-86

72.84

R

R

T









9H-3, 84-86

75.84

T

T










lower Pliocene

9H-5, 84-86

78.84

C

C

C







T

10H-1, 30-32

81.8

C

C

T







T

10H-2, 30-32

83.3

C

R


C






T

10H-3, 30-32

84.8

A

R

T

A






T

10H-4, 30-32

86.3

A

A


C







10H-5, 30-32

87.8

R

R










10H-6, 30-32

98.3

C

C









R

10H-7, 30-32

90.8

A

A

T

R

T






11H-1, 20-22

91.2

C

T



C






11H-2, 20-22

92.7

C

T

T

C






11H-3, 20-22

94.2

A

T

T

A






11H-4, 20-22

95.7

R

R

T








11H-5, 20-22

97.2

A

A










11H-6, 20-22

98.7

C

R

C








11H-7, 20-22

100.2

R

R









R
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

12H-1, 20-22

100.7

B











?
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _  

12H-2, 20-22

102.2

C





C




T

lower B. costairregularis

12H-3, 20-22

103.7

C





C




T

12H-4, 20-22

105.2

R

T

T


T





12H-5, 20-22

106.7

C





C





12H-6, 20-22

108.2

C





R




C

12H-7, 20-22

109.7

T






T




13H-1, 30-32

110.3

C


R



T




13H-2, 30-32

111.8

B











13H-3, 30-32

113.3

R






T

R



13H-4, 30-32

114.8

A






T

A

R


13H-5, 30-32

116.3

R








T


13H-6, 30-32

117.8

C


T


T


C


13H-7, 30-32

119.3

R








R


14H-1, 30-31

119.79

R








R


14H-2, 30-31

121.29

B











14H-3, 30-31

122.79

C








C


14H-4, 30-31

124.29

A








A


14H-5, 30-31

125.79

R








R


14H-6, 30-31

127.29

R








R


14H-7, 30-31

128.79

R





R


T


15H-1, 30-31

129.29

C





C



T

15H-2, 30-31

130.79

B











15H-3, 30-31

132.29

A





T



A

R

15H-4, 30-31

133.79

C





C





15H-5, 30-31

135.29

R





R





15H-6, 30-31

136.79

T





T





15H-7, 30-31

138.29

A





A




R

16H-1, 24-26

138.74

C





C





16H-2, 24-26, thr.*

140.24

5

B











16H-7, 24-26

147.74

T









T

17H-1, 24-26

148.24

T









T

17H-2, 24-26

149.74

B











17H-3, 24-26

151.24

T









T

17H-4, 24-26, thr.*

152.74

9

B











18H-7, 24-26, thr.*

166.74

R





T





19H-3, 24-26

170.24

3

B











?

?

Notes: The subzonal markers are indicated by gray columns. Thr.* = through. In the interval before and after asterisk, author observed the number of barren samples equal to that given in the "Number of Samples" column. A = abundant, C = common, R = rare, T = tracers, B = barren. See text for details.

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