Range chart of calcareous nannofossils in sediment core CRP-2A (Table 1), supplement to: Watkins, David K; Villa, Giuliana (2000): Palaeogene calcareous nannofossils from CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 443-452

Rare calcareous nannofossils from the Cape Roberts Project drillhole CRP-2A indicate that this area was episodically invaded by marginal oceanic surface waters during the late and late early Oligocene. These depauperate assemblages lack most of the biostratigraphic index fossils for the Oligocene, b...

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Bibliographic Details
Main Authors: Watkins, David K, Villa, Giuliana
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2000
Subjects:
DEPTH, sediment/rock
Nannofossil abundance
Nannofossils preservation
Bicolumnus ovatus
Chiasmolithus altus
Dictyococcites bisectus
Dictyococites daviesii
Dictyococites hesslandii
Dictyococites productus
Isthmolithus recurvus
Reticulofenestra hampdenensis
Reticulofenestra minuta
Reticulofenestra minutula
Reticulofenestra oamaruensis
Reticulofenestra umbilicus
Sphenolithus sp.
Thoracosphaera sp.
Thoracosphaera heimii
Thoracosphaera saxea
Nannofossils indeterminata
Triquetrorhabdulus sp.
Species richness
Core wireline system
Abundance estimate
CRP-2
Sampling/drilling from ice
Cape Roberts Project CRP
Victoria Land
Cape Roberts
Watkins
Antarc*
Antarctica
antartic*
Online Access:https://dx.doi.org/10.1594/pangaea.144690
https://doi.pangaea.de/10.1594/PANGAEA.144690
Description
Summary:Rare calcareous nannofossils from the Cape Roberts Project drillhole CRP-2A indicate that this area was episodically invaded by marginal oceanic surface waters during the late and late early Oligocene. These depauperate assemblages lack most of the biostratigraphic index fossils for the Oligocene, but do provide two datum that aid in constraining the age of the section: the last appearance datum (LAD) of Dictyococcites bisectus (23.9 Ma) at 149.28 mbsf and the LAD of Chiasmolithus altus (26.1 Ma) at 412.25 mbsf. Calcareous nannofossil assemblages stratigraphically below c. 440 mbsf contain conspicuous evidence of reworking of older (late Eocene) specimens that renders age determination difficult. : The abundance of individual species is expressed by the following letters:R = rare (<5 sp. per traverse), F = few (6-10 sp. per traverse), C = common (>11 sp. per traverse)

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