Reefal Platform Development, Devonian of the Canning Basin, Western Australia

Playford, Phillip E.; Hurley, Neil F.; Kerans, Charles; Middleton, Michael F.

doi:10.2110/pec.89.44.0187

Cited by 56 publications

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“…The same shoaling-up sequence of facies was observed in several different places in the lagoon between paleoislands. As such, the sequences represent typical carbonate shoaling-up cycles, which have been widely described from Givetian and Frasnian backreef and carbonate platform facies of the Lennard shelf (e.g., Read 1973;Playford et al 1989;Brownlaw et al 1996Brownlaw et al , 1998Hocking and Playford 2001).…”

Section: Physical Aspects Of Coastal Faciesmentioning

confidence: 99%

“…Playford et al (1989) suggested largely continuous transgression in the Lennard Shelf sequence through the Givetian-Frasnian Pillara cycle with a major backstepping platform-drowning event in Late Fransian time. That was followed by a more regressive Famennian Nullara cycle, wherein platforms prograded basinward.…”

Section: Comparisons With Other Former Archipelagosmentioning

confidence: 99%

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Outer Rocky Shores of the Mowanbini Archipelago, Devonian Reef Complex, Canning Basin, Western Australia

Johnson¹,

Webb²

2007

The Journal of Geology

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. A B S T R A C TThe Oscar Range in Western Australia's Canning Basin features inliers of folded Paleoproterozoic quartzite, quartzitic conglomerate, and phyllite that formed islands during the Late Devonian. Undisturbed strata of the Pillara Limestone (Upper Devonian, Frasnian Stage) surround individual paleoislands that rise above the former seabed with a maximum topographic relief of 90 m. On average, the Mowanbini Archipelago (aboriginal name for the Oscar Range) lies 15 km off the granitic and metamorphic mainland represented by the Kimberley Block to the north. Devonian facies on outer rocky shores were studied at three localities near the southeast end of the Oscar Range. At the west end of the study area, a Devonian reef margin sits unconformably on Paleoproterozoic phyllite, but to the east, the reef is separated from rocky shores by a wide lagoon. Massive clast-supported conglomerate and sandstone beds interfinger with backreef carbonates where the reef is closest to land. Across the lagoon 2.5 km eastward, differential erosion between steeply dipping quartzite layers interbedded with softer phyllite resulted in low sea stacks, or skerries. Tabular quartzite cobbles and quartz sand were shed by the skerries as a unidirectional apron of "breccia" under shoal water conditions. Nearby offshore stromatoporoid thickets reflect growth orientation aligned with paleocurrents compatible with the breccia apron. On a smaller island 2.5 km farther east, lateral transport of debris from a quartzite shore to a contiguous phyllite sector of the coast conforms to the same pattern of water circulation. Overall, the physical geography of outer rocky shores in relation to the lagoon and barrier reef suggests that waves crashed over the reef to energize a longshore current that moved west to east at one end of the Oscar Range. A rapid rise in sea level probably promoted the burial and preservation of the Mowanbini Archipelago, characteristics shared with other examples of quartzite paleoislands that date from Cambrian to Cretaceous times.

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Section: Physical Aspects Of Coastal Faciesmentioning

confidence: 99%

Section: Comparisons With Other Former Archipelagosmentioning

confidence: 99%

Outer Rocky Shores of the Mowanbini Archipelago, Devonian Reef Complex, Canning Basin, Western Australia

Johnson¹,

Webb²

2007

The Journal of Geology

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“…Tubiphytes-microbial buildups characterized mostly high relief depositional systems during the crisis periods of large skeletal-metazoans buildups. Examples are recorded from the Upper Devonian (Playford et al 1989;Shen and Bao 1997), Lower Carboniferous (Mundy 1994), Upper Carboniferous (Della Porta et al 2003), Permian (Bebout and Kerans 1993;Saller et al 1999) Marangon et al 2011).…”

Section: Depositional Environmentmentioning

confidence: 99%

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Popa¹,

Panaiotu²,

Grădinaru³

2014

Acta Geologica Polonica

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ABSTRACT:Popa, L., Panaiotu, C.E. and Grădinaru, E. 2014. An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis. Acta Geologica Polonica, 64 (2), 189-206. Warszawa.A well-developed Triassic carbonate platform is exposed in the eastern part of the Tulcea Unit, in the Cimmerian North Dobrogean Orogen, southeastern Romania. Facies analysis of the 200 m thick succession of lower Middle Anisian limestones exposed in a large limestone quarry south of the village of Mahmudia suggests a transition from upper slope towards toe-of-slope carbonate facies, reflecting sea-level fluctuations and tectonic tilting. The slope is dominated by in situ microbialites in the upper portion, consisting of reefal boundstone facies, and by molluscan coquina and cement boundstones. A key role is played by the cosmopolitan micro-encruster Tubiphytes, which became common in the aftermath of the mass extinction at the Permian/Triassic boundary, and by autochthonous micrite and synsedimentary marine cement. The absence of metazoan reef builders, such as sponges and corals, reflects the fact that microbes were the first organisms to recover after the Permian/Triassic crisis under unusual marine conditions and that their main role in reef formation was sediment stabilization along the upper slopes. The lower slope is mostly detrital, being dominated by platform-derived bioclastic rudstones and crinoidal floatstones, which are interbedded with basinal carbonate hemipelagics. The toe-of-slope is composed of pelagic wackestones framed by thin tongues of intraclast breccia. All these observations are in agreement with the slopeshedding model described for the Pennsylvanian microbial margin in Asturias (northern Spain) and the AnisianLadinian flat-topped, steep-rimmed Latemar platform (Dolomites, Italy).As most of the Anisian reefs were described from western and eastern Tethys (Southern Alps, Hungary, China), the occurrence of the early Middle Anisian Tubiphytes-reef from North Dobrogea (Romania) contributes to resolving the puzzle of the geographic distribution of reef recovery in the Middle Triassic.

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“…The generalized eustatic sea level curve is interpreted from Canning 7 Basin and European sections (Joachimski and Buggisch, 1993) and agrees with Hallam and Wignall's (1999) interpretation. This 8 curve does not include possible short-term £uctuations in sea level, such as the one which may have occurred at the Frasnian9 Canada (Mountjoy and Becker, 1996) (Playford et al, 1989). However, the upper posi- (Fig.…”

mentioning

confidence: 99%

Late Devonian carbon isotope stratigraphy and sea level fluctuations, Canning Basin, Western Australia

Stephens

Sumner

2003

Palaeogeography, Palaeoclimatology, Palaeoecology

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Reefal Platform Development, Devonian of the Canning Basin, Western Australia

Cited by 56 publications

References 0 publications

Outer Rocky Shores of the Mowanbini Archipelago, Devonian Reef Complex, Canning Basin, Western Australia

Outer Rocky Shores of the Mowanbini Archipelago, Devonian Reef Complex, Canning Basin, Western Australia

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Late Devonian carbon isotope stratigraphy and sea level fluctuations, Canning Basin, Western Australia

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