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Nannofossil biostratigraphy of the Hantkenina (foraminiferid) interval in the upper Eocene of southern Australia

Created 16/10/2025

Updated 16/10/2025

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Based on calcareous nannofossil evidence, the stratigraphically important interval with Hantkenina (H.) alabamensis primitiva Cushman and Jarvis in the upper Eocene of southern Australia is placed high in the foraminiferal Zone P. 16 of the tropics; previously it was correlated with the upper part of Zone P. 15. Consequently, the upper Eocene sediments above this interval at Browns Creek (Otway Basin) and Blanche Point (St Vincent Basin) are considered to represent an expanded section, with a very high rate of sedimentation. This is consistent with, and probably helps understanding of, the disjunct vertical distribution of several foraminiferal species reported previously in these sediments - particularly at Browns Creek.

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Field Value
Title Nannofossil biostratigraphy of the Hantkenina (foraminiferid) interval in the upper Eocene of southern Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/9dfbb0d4-e91c-4668-8f2d-6da502c125ff
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        136.0,
        -40.0
      ],
      [
        148.0,
        -40.0
      ],
      [
        148.0,
        -33.0
      ],
      [
        136.0,
        -33.0
      ],
      [
        136.0,
        -40.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Nannofossil biostratigraphy of the Hantkenina (foraminiferid) interval in the upper Eocene of southern Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/nannofossil-biostratigraphy-of-the-hantkenina-foraminiferid-interval-in-the-upper-eocene-of-sou