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A belemnite biozonation for the Jurassic-Cretaceous of Papua New Guinea and a faunal comparison with eastern Indonesia

Created 17/10/2025

Updated 17/10/2025

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Middle and Late Jurassic and some Early Cretaceous Belemnitida collected mostly within the region covered by the Ok Tedi and Mianmin 1:250 000 sheets in the central highlands of Papua New Guinea are identical with those of eastern Indonesia. Conodicoelites kalepuensis confirms that part of the Maril Formation is Bathonian in age. Members of the Belemnopsis moluccana-B. galoi-B. stolleyi lineage which spans the Late Jurassic of Indonesia confirm that the Imburu Mudstone and Upper Maril Formation are Oxfordian- Late Tithonian in age. Hibolithes australis n. sp. spans the Late Tithonian-earliest Berriasian interval; Belemnopsis jonkeri and Hibolithes gamtaensis n. sp. range from Berriasian to Valanginian confirming these ages for the Toro Sandstone, basal Ieru Formation and basal Tubu unit. Hibolithes taylori n. sp. (Aptian- Albian), Parahibolites jeraminensis n. sp. (Albian) and Dimitobelus macgregori (Albian- Cenomanian) are present in the Upper Ieru Formation and Chim Formation. The presence of Hibolithes taylori in outcrops previously mapped as Toro Formation suggests that the Aptian- Albian Omati Unit has been wrongly identified as Toro Formation in some instances.

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Title A belemnite biozonation for the Jurassic-Cretaceous of Papua New Guinea and a faunal comparison with eastern Indonesia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/da46690c-4bff-48f0-9313-95727cd30e9e
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
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      ],
      [
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      ],
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      ],
      [
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      ],
      [
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      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "A belemnite biozonation for the Jurassic-Cretaceous of Papua New Guinea and a faunal comparison with eastern Indonesia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-belemnite-biozonation-for-the-jurassic-cretaceous-of-papua-new-guinea-and-a-faunal-comparison