Main Content
Base Miocene
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- Grid data for Petrosys
- Grid data for Zycor
- Coverage (image)
- Two-Way Time Horizon (image)
- Two-Way Time Horizon (printable)
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Following the mid Eocene period of major plate reorganization, the North West Shelf continued to move northwards rapidly, resulting in a dominance of carbonate deposition. The Australian and Antarctic plates moved clear of the Tasmania collision.
The Vulcan Sub-Basin MegaSurvey shows the Base Miocene horizon is at the base of transgressive sands (Oliver Formation) which grade upward to platform carbonates. It is at the top of thick carbonate sequences (Hibernia/Prion Formations) and represents the end of a very long depositional hiatus on the passive shelf margin.
