Upper Devonian microvertebrates from the Canning Basin, Western Australia

Roelofs, Brett; Playton, Ted; Barham, Milo; Trinajstic, Kate

doi:10.1515/agp-2015-0003

Cited by 10 publications

(15 citation statements)

References 72 publications

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“…Very similar is the collection of specimens from Horse Spring in the Canning Basin area, north-western Australia, recently described by Roelofs et al (2015). Here, among 34 shark teeth from five samples dated as jamieae-Lower rhenana Conodont zones (MN11 Montagne Noire zone), 31 belong to at least three species of Phoebodus (including strange, probably juvenile teeth of Ph.…”

Section: Discussionsupporting

confidence: 69%

A classic Late Frasnian chondrichthyan assemblage from southern Belgium

Ginter

Gouwy

Goolaerts

2017

Acta Geologica Polonica

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ABSTRACT:Ginter, M., Gouwy, S. and Goolaerts, S. 2017. A classic Late Frasnian chondrichthyan assemblage from southern Belgium. Acta Geologica Polonica, 67 (3), 381-392. Warszawa.Samples from the Upper Frasnian (Devonian) of Lompret Quarry and Nismes railway section in Dinant Synclinorium, southern Belgium, yielded several chondrichthyan teeth and scales. The teeth belong to three genera: Phoebodus, Cladodoides and Protacrodus. The comparison with selected Late Frasnian chondrichthyan assemblages from the seas between Laurussia and Gondwana revealed substantial local differences of taxonomic composition due to palaeoenvironmental conditions, such as depth, distance to submarine platforms, oxygenation of water, and possibly also temperature. The assemblage from Belgium, with its high frequency of phoebodonts, is the most similar to that from the Ryauzyak section, South Urals, Russia, and the Horse Spring section, Canning Basin, Australia.

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Section: Discussionsupporting

confidence: 69%

A classic Late Frasnian chondrichthyan assemblage from southern Belgium

Ginter

Gouwy

Goolaerts

2017

Acta Geologica Polonica

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“…(Wheeley et al, 2012). Subsequent work by Trotter et al (2015) showed an average offset of 0.6 ± 0.2 ‰ between the two methodologies, similar to earlier work of 0.7 ‰ (Trotter et al, 2008 (Becker, 2000), conodont (Nicoll and Druce, 1979;Klapper, 2006) and vertebrate microfossil taxa (Turner, 1982;Trinajstic and George, 2009;Hairapetian et al, 2015;Roelofs et al, 2015Roelofs et al, , 2016 in the Late Devonian and Early Carboniferous suggests that pathways existed for significant faunal exchange. Furthermore, the recovery, from the Lennard Shelf, of globally correlative carbon isotope signatures associated with the Kellwasser Event (Stephens and Sumner, 2003;Playton et al, 2013;George et al, 2014;Hillbun et al, 2015), and presence of a significant regression (Talent et al, 1993) and negative δ 13 C excursion (Andrew et al, 1994) = +21.7 ‰) from latitudinally equivalent sites reported in Joachimski et al (2004Joachimski et al ( , 2009 elements tested was +20.4 ±0.9 ‰.…”

Section: -supporting

confidence: 78%

“…Upper Devonian vertebrate microfossils are common in the distal slope facies of the Virgin Hills Formation (late Frasnian -middle Famennian; Fig. 1; Playford et al, 2009;Trinajstic and George, 2009;Trinajstic et al, 2014;Roelofs et al, 2015) and in the conodont-poor facies of the Fairfield Group (Upper Devonian-Lower Carboniferous) (Roelofs et al, 2016;Thomas, 1957Thomas, , 1959. Twenty kilogram samples were collected from single beds at Horse Spring (18°11′41′′ S, 126°01′69′′ E) (sample prefix VHS), Oscar Hill (18°04'07" S, 125°26'41" E) (sample prefixes OH, Si) and Laurel Downs (18°01'37" S, 125°18'43" E) (sample prefixes 1984,…”

Section: Sample Collection Processing and Imagingmentioning

confidence: 99%

Assessing the fidelity of marine vertebrate microfossil δ18O signatures and their potential for palaeo-ecological and -climatic reconstructions

Roelofs

Barham

Cliff

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Conodont biogenic apatite has become a preferred analytical target for oxygen isotope studies investigating ocean temperature and palaeoclimate changes in the Palaeozoic. Despite the growing application in geochemically-based palaeoenvironmental reconstructions, the paucity or absence of conodont fossils in certain facies necessitates greater flexibility in selection of robust oxygen-bearing compounds for analysis. Vertebrate microfossils (teeth, dermal denticles, spines) offer a potential substitute for conodonts from the middle Palaeozoic. Vertebrate bioapatite is particularly advantageous given a fossil record extending to the present with representatives across freshwater to fully marine environments, thus widening the scope of oxygen isotope studies on bioapatite. However, significant tissue heterogeneity within vertebrates and differential susceptibility of these tissues to diagenetic alteration have been raised as potential problems affecting the reliability of the oxygen isotope ratios as palaeoclimatic proxies. Well-preserved vertebrate microfossils and co-occurring conodont fossils from the Upper Devonian and Lower Carboniferous of the Lennard Shelf, Canning Basin, Western Australia, were analysed using bulk (gas isotope ratio mass spectrometry, GIRMS) and in-situ (secondary ion mass spectrometry, SIMS) methodologies, with the latter technique allowing investigation of specific tissues within vertebrate elements. The δ 18 O conodont results may be interpreted in terms of palaeolatitudinally and environmentally sensible palaeo-salinity and-temperature and provide a baseline standard for comparison against vertebrate microfossil δ 18 O values. Despite an absence of obvious diagenetic modification, GIRMS of vertebrate denticles yielded δ 18 O values depleted in 18 O by 2-4 ‰ relative to co-occurring conodonts. SIMS analysis of dentine tissues exhibited significant heterogeneity, while hypermineralised tissues in both scales and teeth produced δ 18 O values comparable with those of associated conodonts. The susceptibility of permeable phosphatic fossil tissues to microbial activity, fluid interaction and introduction of mineral precipitates post-formation is demonstrated in the dentine of vertebrate microfossils, which showed significant heterogeneity and consistent depletion in 18 O relative to conodonts. The hypermineralised tissues present in both teeth and scales appear resistant to many diagenetic processes and indicate potential for palaeoclimatic reconstructions and palaeoecological investigations.

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“…The Canning Basin was thus situated at the junction of major terranes and is therefore an ideal study area to evaluate Late Devonian faunal exchanges between these landmasses. Common faunal components between the Canning Basin and areas in South China and south-east Asia are known for several vertebrate groups from the Late Devonian, including placoderms (Young, 1984;Young et al, 2010) and chondrichthyans (Trinajstic and George, 2009;Roelofs et al, 2015). In addition, the jawless thelodonts are known from the uppermost Devonian in Iran (Hairapetian et al, 2015) North Gondwana and north-western Australia (Trinajstic, 2001;Hairapetian et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Late Devonian and Early Carboniferous chondrichthyans from the Fairfield Group, Canning Basin, Western Australia

Roelofs

Barham

Mory

et al. 2016

Palaeontologia Electronica

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Teeth from 18 shark taxa are described from Upper Devonian to Lower Carboniferous strata of the Lennard Shelf, Canning Basin, Western Australia. Spot samples from shoal facies in the upper Famennian Gumhole Formation and shallow water carbonate platform facies in the Tournaisian Laurel Formation yielded a chondrichthyan fauna including several known species, in particular Thrinacodus ferox, Cladodus thomasi, Protacrodus aequalis and Deihim mansureae. In addition, protacrodont teeth were recovered that resemble formally described, yet unnamed, teeth from Tournaisian deposits in North Gondwanan terranes. The close faunal relationships previously seen for Late Devonian chondrichthyan taxa in the Canning Basin and the margins of northern Gondwana are shown here to continue into the Carboniferous. However, a reduction in species overlap for Tournaisian shallow water microvertebrate faunas between the Canning Basin and South China is evident, which supports previous studies documenting a separation of faunal and terrestrial plant communities between these regions by this time. The chondrichthyan fauna described herein is dominated by crushing type teeth similar to the shallow water chondrichthyan biofacies established for the Famennian and suggests some of these biofacies also extended into the Early Carboniferous.

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Upper Devonian microvertebrates from the Canning Basin, Western Australia

Cited by 10 publications

References 72 publications

A classic Late Frasnian chondrichthyan assemblage from southern Belgium

A classic Late Frasnian chondrichthyan assemblage from southern Belgium

Assessing the fidelity of marine vertebrate microfossil δ18O signatures and their potential for palaeo-ecological and -climatic reconstructions

Late Devonian and Early Carboniferous chondrichthyans from the Fairfield Group, Canning Basin, Western Australia

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