Tectonic Control on Backstepping Sequences Revealed by Mapping of Frasnian Backstepped Platforms, Devonian Reef Complexes, Napier Range, Canning Basin, Western Australia

Ward, W. Peter

doi:10.2110/pec.99.11.0047

Cited by 18 publications

(31 citation statements)

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“…That was followed by a more regressive Famennian Nullara cycle, wherein platforms prograded basinward. Ward (1999) and George et al (2002) suggested that the progradational phase began in latest Frasnian time. This is consistent with data compiled by Talent and Yolkin (1987) for a Devonian sea level drop in the Canning Basin toward the close of Frasnian time and a renewed rise in sea level called the Westwood transgression in Early Famennian time.…”

Section: Comparisons With Other Former Archipelagosmentioning

confidence: 98%

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: Comparisons With Other Former Archipelagosmentioning

confidence: 98%

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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“…The Frasnian^Famennian 32 boundary marks one of the ¢ve major extinctions 33 of the Phanerozoic (Sepkoski, 1996) and has been 34 a major focus of Late Devonian stratigraphic and 35 geochemical studies (Becker et al, 1993;Geldset-36 zer et al, 1993;Joachimski and Buggisch, 1993; 37 Kennard et al, 1992;Playford et al, 1984; 38 Southgate et al, 1993;Wang et al, 1996;Joa-39 chimski et al, 2002). Sea level changes have 40 been proposed as contributing factors to mass 41 extinctions (Copper, 1986;Thompson and New-42 ton, 1988; Joachimski and Buggisch, 1993;Hal- versial (Southgate et al, 1993;Holmes and Chris-94 tie- Blick, 1993;Whittam et al, 1994;Becker and 95 House, 1997; George et al, 1997;Ward, 1999).…”

Section: Article In Pressmentioning

confidence: 99%

“…A N 13 C curve for 145 upper Frasnian to lower Famennian strata has 146 already been de¢ned from European, North 147 American, and Australian stratigraphic sections 148 (Joachimski and Buggisch, 1993;Wang et al, 149 1996;Joachimski et al, 2002) (Playford, 182 1980;Hurley, 1986 (Holmes and Christie-Blick, 1993;Southgate et 190 al., 1993) that accommodated over 2 km of vonian strata (Brown et al, 1984 (Ward, 1999 (Hurley, 1986).…”

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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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“…Palaeogeographically the Glenister Knolls are an extension of the southern tip of the Laidlaw Range carbonate platform and formed a set of isolated patch reefs. Modified after Playford & Hocking (1998 studied in this area (Playford et al, 1989;Ward, 1999).…”

Section: Geological Settingmentioning

confidence: 99%

Fine‐Scale Forward Modelling of a Devonian Patch Reef, Canning Basin, Western Australia

Hasler

Adams

Woods

et al. 2008

Analogue and Numerical Modelling of Sedimentary Systems: From Understanding to Prediction

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Although factors that control the distribution of carbonate sediments are relatively well understood, their interaction in producing known geometries remains poorly known. A fine-scale forward model was developed to analyse the controls on decimetre-scale heterogeneity and carbonate facies distribution within larger-scale sediment bodies. The model was tested on a Frasnian (Late Devonian) patch reef, part of the so-called Glenister Knolls reef complex in the Canning Basin, Western Australia. The evolution of Glenister Knolls was digitally reconstructed using digital surveying technologies that resulted in a high-resolution dataset containing geological information from centimetrescale to outcrop dimensions. The three-dimensional digital outcrop model of Glenister Knolls was used to evaluate predictions from the fine-scale forward modelling results.The fine-scale forward model is based on a stochastic cellular automaton that simulates the spatial distribution of carbonate facies through time. The modelled carbonate facies is based on two main factors, stromatoporoid growth and sediment transport, and it successfully predicts the distribution of the basic elements -reef fabric and sediment -that compose the patch reef. The fine-scale forward model also successfully reproduces all major depositional relationships observed in the field such as backstepping, downlapping and interfingering contacts. The external structure of the reef is very sensitive to subsidence and production rates, since these directly influence accommodation space so constraining the vertical growth of the patch reef. However, the internal structure predicted by this model does not seem to be affected by one specific parameter, and displays the same sensitivity to other parameters, such as current intensity and wave amplitude.

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Tectonic Control on Backstepping Sequences Revealed by Mapping of Frasnian Backstepped Platforms, Devonian Reef Complexes, Napier Range, Canning Basin, Western Australia

Cited by 18 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

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

Fine‐Scale Forward Modelling of a Devonian Patch Reef, Canning Basin, Western Australia

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