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Top Permian
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- Grid data for Petrosys
- Grid data for Zycor
- Coverage (image)
- Two-Way Time Horizon (image)
- Two-Way Time Horizon (printable)
Previous: Callovian Unconformity
Following the Late Carboniferous rift phase which lead to the creation of the Westralian Superbasin (AGSO, 1994), the synrift deposits comprised glacio-fluvial sediments which are overlain by a sag section of significant thickness. Two units are recognized within this sag section. The deposition of the Permian, shelf and shallow water carbonates and sands were separated from the overlying thick Triassic shales by a major eustatic lowstand (Nicoll and Foster 1994, Longley et al 2002).
The Vulcan Sub-Basin MegaSurvey places the Top Permian horizon at the top of two thick regional limestone sequences (Hyland Bay Formation), and at the base of the Mt. Goodwin Formation shales and represents the effective basement in the Sub-basin.
The Carnarvon Basin MegaSurvey demonstrates that interpretation was only possible for approximately 3,000km2 out of a potential 10,000km2 due to the pick falling dipping below the record length of the 3Dseismic data
