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A new Devonian fish fauna, and revision of post-Ordovician stratigraphy in the Ross River Syncline, Amadeus Basin, central Australia.

Created 17/10/2025

Updated 17/10/2025

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A Devonian microvertebrate fauna from the NDahla Member, previously assigned to the Cambro-Ordovician Pacoota Sandstone, has led to a revision of the stratigraphy in the Ross River Syncline. The NDahla Member is included in the Devonian Pertnjara Group, and is correlated on faunal evidence with the Deering Siltstone Member of the Parke Siltstone in the central Amadeus Basin. The overlying sandstone, previously mapped as Mereenie Sandstone, is presumed to be equivalent to one of the overlying formations of the Pertnjara Group. The NDahla Member rests with angular unconformity on the underlying Pacoota Sandstone, this break possibly representing both the Rodingan and Pertnjara Movements of other authors. Evidence of the Devonian Pertnjara Movement in the Amadeus Basin is reviewed, and the possibility that the Mereenie Sandstone was never deposited in the Ross River sequence is discussed. The recognition of Mereenie Sandstone in other outcrops and wells in the eastern part of the Amadeus Basin requires re-examination.

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Field Value
Title A new Devonian fish fauna, and revision of post-Ordovician stratigraphy in the Ross River Syncline, Amadeus Basin, central Australia.
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/7db5a6c0-c4f4-4368-8212-4f810bcd89e1
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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  "type": "Polygon"
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Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "A new Devonian fish fauna, and revision of post-Ordovician stratigraphy in the Ross River Syncline, Amadeus Basin, central Australia.". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-new-devonian-fish-fauna-and-revision-of-post-ordovician-stratigraphy-in-the-ross-river-syncli