Table T11. Cenozoic calcareous nannoplankton occurrences.
Species
LO
HO
Level (ft)
Stratigraphic level
Chiasmolithus grandis
X 171–166 Top Zone NP17
Chiasmolithus solitus
X 196–191 Top Zone NP16
Reticulofenestra umbilicus X
235–241.5 In lower Zone NP16
Nannotetrina fulgens
X 241.5–235 Top in mid Zone NP16
Chiasmolithus gigas
X 241.5–235 Top Subzone NP15b
Chiasmolithus gigas X
261–266 Base Subzone NP15b
Nannotetrina fulgens X
261–266 Base Zone NP15
Discoaster. sublodoensis X
271–276 Base Zone NP14
Discoaster. lodoensis
X 266–261 Top Subzone NP14a
Discoaster. kuepperi
X 271–266 Near Top Subzone NP14a
Tribrachiatus orthostylus
X 276–271 Top Zone NP12
Discoaster lodoensis X
316–321 Base Zone NP12
Tribrachiatus orthostylus X
356–361 In upper Subzone NP10c
Tribrachiatus contortus
X Top Zone NP10
Discoaster multiradiatus X
396–401 Base Zone NP9
Discoaster. anartios X X 376 Restricted to base Subzone NP9b
Heliolithus riedeli X
461–456 Base Zone NP8
Heliolithus kleinpelli X
471–466 Base Zone NP6
Fasciculithus tympaniformis X
471–466 Base Zone NP5
Ellipsolithus macellus X
501–494.7 Base Zone NP4
Sphenolithus primus X
481–476 Base Subzone NP4b
Chiasmolithus danicus X
501–494.7 Base Zone NP3
C. tenuis X
505–501 Base Zone NP2
Cruciplacolithus primus X
505–501 Base Zone NP1b

Notes: LO = lowest occurrence, HO = highest occurrence. — = not found.