150 m thick atoll structure.
Giant oil field
Probably ranging up to the Bashkirian.
Chlorophyta (Calcifolium), hyrozoans (?), corals as reef builders.
Additionally forams, crinoids, brachiopods, stromatolites.
17x23 km size. Depth of roof 4000-4100 m.
Kenter et al. in AAPG 2004 abstract: The Late Visean and Serpukhovian is characterized by several kilometers of platform progradation, followed by drowning and termination of the platform in the early Bashkirian. Platform to basin relief approached 1.5 km.