Stratno | Stratigraphic Name | Category | Contents | Last update 
81057|J10|Type section locality|Representative section: North Rankin 6 (3142.21-3277.28 m), Dampier Sub-basin, Northern Carnarvon Basin. Comparative Sections: Barcoo 1 and Torosa 1, Browse Basin.|16-MAY-23
81057|J10|Age reasons|Spans the lower part of the C. torosa Zone. Dinoflagellates only occur rarely and are assignable to the D. priscum (upper) zone.|16-MAY-23
81054|J20|Type section locality|Representative ssection: Delambre 1 (2348.35-4162.1 m), Northern Carnarvon Basin. Comparative sections: Huntsman 1, Beagle Sub-basin, Nthn Carnarvon; Barcoo 1, Browse Basin; Sunrise 2,  Troubadour 1 and Abadi 1. all Bonaparte Basin.|16-MAY-23
81054|J20|Age reasons|Key biostratigraphic markers: Spans the C. torosa, C. turbatus, D. complex, and C. cooksaniae zones. The appearance of the D. caddaense dinoflagellate zone at the base of the D. complex spore-pollen zone, represents a marked change in the dinoflagellate assemblages in that they become more diverse and arealy extensive and the associated zones can be traced the length of the Westralian Super-basin. The overlying dinoflagellate zones to the top of J20 include the N. deflandrei, W. verrucosa, and W. indotata zones.  Dinoflagellates are absent or only occur in low diversity assemblages in the C. torosa and C. turbatus zones and this is a feature of assemblages of this age globally.|16-MAY-23
81053|J30|Type section locality|Representative section: Samson 1 (2755.87-3445.0 m), Dampier sub-basin, Northern Carnarvon Basin. Comparative sections: Nebo 1, Beagle Sub-basin, Nthn Carnarvon;  and Laminaria 2, Bonaparte Basin.|16-MAY-23
81053|J30|Age reasons|Key biostratigraphic marker: T. balmei, V. tabulata and C. ancorum dinoflagellate zones (old R. aemula and W. digitata zones). These are some of the few dinoflagellate zones that have had to be redefined since their initial definition and this has been addressed by Riding et al. (2010). This interval is now assigned to the T. balmei, V. tabulata and C. ancorum zones. The biostratigraphic events bounding the base and top of the three zones are the same as those used by Helby et al (1987) for the R. aemula and W. digitata zones: ie. the first appearance of W digitata; the first appearance of S. crystallinum.|16-MAY-23
81051|J50|Type section locality|Representative section(s): Dampier 1 (2898.08-3701.62 m) and Wanaea 1 (2804.8-3440.0 m),  Dampier Sub-basin, Northern Carnarvon Basin. Comparative sections: Enfield 3, Beg 1, Exmouth Sub-basin, Nthn Carnarvon; lchthys Deep 1, Browse Basin;  and Alaria 1, Bonaparte Basin.|16-MAY-23
81051|J50|Age reasons|Key biostratigraphic marker: C. perforans, O. montgomeryi, D. jurassicum and P. iehiense dinoflagellate zones. The Tithonian contains some of the richest dinoflagellate assemblages of any age on the North West Shelf and has the potential to produce high resolution biostratigraphic control. Based on the detailed sampling of well sections in the Dampier Sub-basin, the D. jurassicum and P. iehiense zones have been subdivided into a series of nine high resolution subzones by Bint & Marshall (1994). Changes in dinoflagellate diversity and dinoflagellate/spore-pollen abundance define a trend of increasing marine influence from the base to the upper part of the section. The only deviation from this trend is a sharp increase in dinoflagellate abundance in the O. montgomeryi Zone.|16-MAY-23
81050|K10|Type section locality|Representative section: Wanaea 2 (2581.0-2877.1 m), Dampier Sub-basin, Northern Carnarvon Basin. Comparative sections: Sirius 1 and Investigator 1, Exmouth Plateau, Nthn Carnarvon; John Brookes 1/ST1, Barrow Sub-basin, Nthn Carnarvon.|16-MAY-23
81050|K10|Age reasons|Key biostratigraphic marker: K. wisemaniae, C. delicata, B. reticulatum and E. torynum dinoflagellate zones. Palynology and associated well data suggests that the overall marine influence within K10 is slightly less than in the underlying J50 sequence. The palynological assemblages within the K10 sequence over the Exmouth Sub-basin are often characterised in having high proportions of reworked Permo/Triassic spore-pollen.|16-MAY-23
81048|K30|Type section locality|Representative section: Wanaea 1 (2433.0-2493.0 m), Dampier Sub-basin, Northern Carnarvon Basin. Comparative Section: Sunrise 2, Bonaparte Basin.|16-MAY-23
81048|K30|Age reasons|Key biostratigraphic marker: middle M. australis - O. operculata (lower) dinoflagellate zones. Section extends from an interpreted maximum flooding surface near the boundary between the lower and middle M. australis Zone to the top of the O. operculata (lower) Zone.|16-MAY-23
81047|K40|Type section locality|Representative Section: Wanaea 1 (2354.0-2433.0 m), Dampier Sub-basin, Northern Carnarvon Basin. Comparative Section: Sunrise 2, Bonaparte Basin.|16-MAY-23
81047|K40|Age reasons|Key biostratigraphic marker: O. operculata (upper) - upper part of the D. multispinum dinoflagellate zones. Section overlying the K40.0 SB is often either barren of palynomorphs or contains sparse assemblages of uncertain age.|16-MAY-23
81060|TR10|Type section locality|Representative Section: Composite section: Kybra 1 (507.7- 1495.45 m), Hermite 1 (2545.34-3300.0 m) Barrow Sub-basin; and Goodwyn 6 (3858.34-4664.0 m), Dampier Sub-basin, Northern Carnarvon Basin.Comparative sections: Osprey 1, Whimbrel 1 and Kelp Deep 1, Bonaparte Basin.|16-MAY-23
81060|TR10|Age reasons|Key biostratigraphic marker: K. saeptatus - M. crenulatus zones. The upper part of the interval can be associated with the R. wigginsii Zone. The S. otti dinoflagellate zone is linked to the S. quadrifidus spore-pollen zone within this interval, but there is little known about this association. The lower part of the interval can be associated with high abundances of the spiny acritarchs Michrystidium and Veryhachium spp., and this is considered to reflect wide shelfal seas that onlapped the Australian craton along the entire North West Shelf during this time.|16-MAY-23
81059|TR20|Type section locality|Representative sections: Composite section including Goodwyn 6 (2773.13-3858.34 m), Goodwyn 5 (2797.47- 3664.0 m), Goodwyn 2 (2846.0-3750.0 m) and North Rankin 5 (2925.47-3500.0 m), Dampier Sub-basin, Northern Carnarvon Basin. Comparative sections: Jupiter 1, Exmouth Plateau, Nthn Carnarvon; and North Hibernia 1, Bonaparte Basin.|16-MAY-23
81059|TR20|Age reasons|Key Biostratigraphic Marker: Spans the M. crenulatus spore-pollen zone. Two marine flooding cycles are identified that contain dinoflagellates: 1] W. listeri Zone dinoflagellates associated with the TR21.1 TS in the outer Exmouth Plateau and 2] H. balmei Zone dinoflagellates associated with the TR26.5 MFS,which has been identified over much of the Northern Carnarvon Basin.  High resolution palynological studies of the M. crenulatus section has enabled the recognition of a series of eight palynological subzones and this work has proven invaluable for correlating the incomplete Triassic sections drilled along the Gorgon and Rankin platforms. These sections are incomplete because of partial penetration by the drill bit, top truncation by J40.0 SB, and in some cases, intersection of major faults. In the outboard wells, some intervals contain rare calcareous nannoplankton assignable to zones NT1 and NT2a.|16-MAY-23
81058|TR30|Type section locality|Representative section(s): North Rankin 5 (2677.73-2925.47 m) and North Rankin 6 (3277.28-3549.42 m), Dampier Sub-basin, Northern Carnarvon Basin. Comparative sections: Ashmore Reef 1, Bonaparte Basin;  fine grained carbonates at Jupiter 1, carbonate reefal build ups at Tiberius 1, Exmouth Plateau, Sthn Carnarvon; and in ODP Site 764B, Wombat palteau, Northern Carnarvon Basin.|16-MAY-23
81058|TR30|Age reasons|Spans the A. reducta spore-pollen zone. Associated with the R. rhaetica and D. priscum (lower) dinoflagellate zones. The outboard sections contain calcareous nannoplankton assignable to the NT2b Zone.  The A. reducta Zone is often difficult to identify on spore-pollen criteria and it is usually the associated dinoflagellates that provide the biostratigraphic control. Although dinoflagellates are persistently present throughout the entire stratigraphic section, their abundances are never particularly high. This is true for both the siliciclastic inboard facies and also the more calcareous outboard facies. In the inboard Northern Carnarvon Basin, the TR30 interval is characterised at its base by the first consistent appearance of typically marine dinoflagelllates. These persist throughout the section and the top of the interval is characterised by the extinction of most Triassic spore-pollen and a considerable number of dinoflagellates.|16-MAY-23
