Table T2.
Datum levels used for the calculation of the Site 1131 sedimentation rate.
Stratigraphic
error
(m)
Upper
sample
Lower
sample
Datum
typeDatum
level
Age
(Ma)Midpoint
(mbsf)
Fossil
groupCore,
section, interval (cm)
Depth
(mbsf)
Core,
section, interval (cm)
Depth
(mbsf)
182-1131A-
182-1131A-
T
Pseudoemiliania
lacunosa
0.45
136.10
4.90
1
15X-CC, 19-22
131.17
16X-CC, 16-19
140.96
T
Reticulofenestra
asanoi
0.88
251.60
0.92
1
28X-CC, 12-15
250.66
29X-CC, 0-2
252.50
Brunhes/Matuyama
0.78
295.15
4.75
Top of Jaramillo
0.99
333.50
4.80
T
Calcidiscus
macintyrei
1.67
445.10
6.55
1
48X-CC, 29-32
438.47
49X-CC, 33-36
451.62
B
Globorotalia
truncatulinoides
2
517.26
4.76
4
56X-CC, 28-31
512.50
57X-CC, 47-50
522.01
B
Globorotalia
crassaformis
4.5
527.03
5.02
4
57X-CC, 47-50
522.01
58X-CC, 0-3
532.04
T
Globoquadrina
dehiscens
5.8
527.05
5.02
4
57X-CC, 47-50
522.01
58X-CC, 0-3
532.04
B
C. macintyrei
12.3
545.09
4.71
1
59X-CC, 19-22
540.39
60X-CC, 0-2
549.80
T
Sphenolithus
heteromorphus
13.6
573.62
4.81
1
62X-CC, 0-2
568.80
63X-CC, 0-3
578.40
Notes: T = top of taxon stratigraphic range, B = bottom of taxon stratigraphic range. Midpoint = the middle depth between the sample where the taxon occurs and the adjacent sample where it does not occur. Stratigraphic error = one-half the distance between these two samples. Datum level code = the number assigned to the datum level on Figure F5. Fossil groups: 1 = calcareous nannofossils, 4 = planktonic foraminifers.