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Quaternary Evolution, Modern Geological Processes and Potential Effects of Additional Petroleum Exploration Activity on the Van Diemen Rise, Timor Sea (East Malita Graben Area) : Release 1 of 1992

Created 16/10/2025

Updated 16/10/2025

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To meet the formal requirements for the collection, interpretation and analysis ofenvironmental baseline data in Australia's offshore areas in which further petroleumexploration could take place, the modern geological processes, Quaternary evolutionand environmental features of the potential release area(s) in the Van Diemen Rise(East Malita Graben, Timor Sea) which will be included in the first release of 1992are described, analysed and interpreted. The potential release area(s) overlie part of the Van Diemen Rise in the eastern partof the Timor Sea in the vicinity of Cootamundra and Evans Shoals. Sea bottomsediments in the region are dominantly calcareous sand grade and derived from thebreakdown of skeletal material which has developed on an extensive number ofbanks and shoals which characterise this part of the continental shelf. The sea bottom is also marked by a number of sinuous and narrow curvilinearchannel like features which along with other geomorphic elements are attributed tothe effects of subaerial exposure and weathering of the carbonate shelf sedimentwedge during Quaternary lower sea level stages, as well as marine and coastalprocesses which occurred during sea level rise and marine inundation. The Holocene rise in sea level has resulted in inundation of a large number of wave-cut scarps, channels and flat top banks, the latter of which became the focus ofcarbonate reef growth and hence a source of much of the sand-grade carbonatesediments evident on the sea floor.

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Title Quaternary Evolution, Modern Geological Processes and Potential Effects of Additional Petroleum Exploration Activity on the Van Diemen Rise, Timor Sea (East Malita Graben Area) : Release 1 of 1992
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/4b7c93ee-9119-4fa7-b1f2-e8844f9b1975
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Quaternary Evolution, Modern Geological Processes and Potential Effects of Additional Petroleum Exploration Activity on the Van Diemen Rise, Timor Sea (East Malita Graben Area) : Release 1 of 1992". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/quaternary-evolution-modern-geological-processes-and-potential-effects-of-additional-petro-1992