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Sequence Stratigraphic Correlation of Onshore and Offshore Bight Basin Successions : Southern Australia Regional Project

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Created 13/01/2025

Updated 13/01/2025

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This Record presents a new stratigraphic interpretation of Cretaceous sedimentary rocks encountered in petroleum exploration wells, stratigraphic holes and water bores along the southern Australian coast in Western Australia and South Australia. The Cretaceous succession in these wells is interpreted within the Bight Basin sequence stratigraphic framework, and is correlated with the thicker section farther basinward. The correlation is based on existing and recently commissioned biostratigraphic data, and the interpretation of seismic data on the continental shelf. The onshore wells contain a sedimentary section ranging in age from Valanginian to Campanian, and attributable to the Bronze Whaler, Blue Whale-White Pointer, Tiger and Hammerhead supersequences. The succession reaches a maximum thickness of more than 357 m in the Madura 1 well. The section preserved in these wells records the evolution of depositional environments near the northern margin of the Bight Basin, from areally restricted non-marine deposition in the Early Cretaceous, through increasingly marine, although shallow and anoxic, conditions, to the local development of a small deltaic complex in the Late Cretaceous. Organic-rich non-marine shales of Early Cretaceous age, and Late Cretaceous organic-rich facies of marine affinity have been identified in wells in the study area., providing new information about the nature and extent of potential source rocks in the Bight Basin.

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Title Sequence Stratigraphic Correlation of Onshore and Offshore Bight Basin Successions : Southern Australia Regional Project
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/fae0940e-d9e6-4ea8-9872-33f6dd7f8fc6
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[124.0, -36.0], [133.0, -36.0], [133.0, -30.0], [124.0, -30.0], [124.0, -36.0]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Sequence Stratigraphic Correlation of Onshore and Offshore Bight Basin Successions : Southern Australia Regional Project". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/sequence-stratigraphic-correlation-of-onshore-and-offshore-bight-basin-successions-southern-aus1

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