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The late Cainozoic evolution of the Carpentaria Plains, North Queensland

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Created 20/01/2025

Updated 20/01/2025

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The Pliocene to Holocene fluvial sediments of the Carpentaria Plains southeast of the Gulf of Carpentaria, Queensland have formed sandy and silty plains in fan settings to the east, and clayey and silty flood plains to the south. This paper proposes a geological and geomorphological history of development of the flood plains and fans of past and present river systems of the Gulf Country. The formation of the depositional plains began in Pliocene times with upwarping of the marginal parts of the Karumba Basin to create an erosional source area. The deposition was in five stages, separated by periods of stability or incision. These stages were affected by continuing movements in the southeast, Pleistocene eustacy, and by climatic changes - in particular by one or more periods of aridity. The younger fans are still accumulating locally. In the southern flood plains there is at present a balance between erosion and deposition. The lithofacies distribution within the southern flood plains was controlled by differences between the source areas and by the prior topography of the depositional area, which guided streams from the different source areas and prevented mixing of the different types of sediment.

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Title The late Cainozoic evolution of the Carpentaria Plains, North Queensland
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/1b2dacc7-248d-42b6-a471-8f7de49c4754
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[139.0, -21.0], [144.5, -21.0], [144.5, -13.9], [139.0, -13.9], [139.0, -21.0]]]}
Data Portal data.gov.au