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Macrostrat
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Collosphaera tuberosa
1628
Type
Zone
Age range
0.42–0.18
Ma
International Timescale
Pleistocene
Chibanian
Low Latitude Radiolarian Zonation
Buccinosphaera invaginata
Collosphaera tuberosa
Stylatractus universus
0.43
0.42
0.41
0.40
0.39
0.38
0.37
0.36
0.35
0.34
0.33
0.32
0.31
0.30
0.29
0.28
0.27
0.26
0.25
0.24
0.23
0.22
0.21
0.20
0.19
0.18
0.17
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