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Refined age and geological context of two of Australia's most important Jurassic vertebrate taxa (Rhoetosaurus brownei and Siderops kehli), Queensland

Published on Dec 1, 2019in Gondwana Research 6.48
· DOI :10.1016/j.gr.2019.05.008
Christopher N. Todd1
Estimated H-index: 1
(JCU: James Cook University),
Eric M. Roberts25
Estimated H-index: 25
(JCU: James Cook University)
+ 3 AuthorsCarl Spandler27
Estimated H-index: 27
(JCU: James Cook University)
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Abstract
Abstract Australia's Jurassic vertebrate fossil record remains extremely sparse with only two dinosaur taxa and two temnospondyl amphibians identified to date. Of these, the spectacular and extremely well-preserved giant amphibian, Siderops kehli , and the only known pre-Cretaceous sauropod in Australia, Rhoetosaurus brownei , are perhaps the most important. The age of both specimens, and the stratigraphic context of Rhoetosaurus brownei , are weakly constrained and imprecisely defined, limiting our understanding of their evolutionary relationships within a broader Gondwanan context. To clarify and contextualise the evolutionary relationships and ages of these two iconic Jurassic taxa, we used U Pb detrital zircon geochronology to date the sandstone matrix from around the bones of the historic museum specimens. The robust maximum depositional age for Siderops was calculated at 176.6 Ma ± 2 Ma, indicating that it is no older than late Toarcian, which refines existing biostratigraphic estimates. The Rhoetosaurus maximum depositional age determined is 162.6 ± 1.1 Ma, no older than early Oxfordian, demonstrating that the fossils are younger than expected, and definitely recovered from the Walloon Coal Measures.
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References32
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Published on Jul 3, 2018in Alcheringa 1.02
Carmine C. Wainman4
Estimated H-index: 4
,
C. Hannaford1
Estimated H-index: 1
+ 1 AuthorsPeter J. McCabe20
Estimated H-index: 20
Wainman, C.C., Hannaford, C., Mantle, D. & McCabe, P.J., April.2018. Utilizing U–Pb CA-TIMS dating to calibrate the Middle to Late Jurassic spore-pollen zonation of the Surat Basin, Australia to the geological time-scale. Alcheringa XX, xx-xx.Spore-pollen palynostratigraphy is commonly used to subdivide and correlate Jurassic continental successions in eastern Australia and thus aid the construction of geological models for the petroleum and coal industries. However, the current spore-pollen fra...
Published on Jun 1, 2018in AAPG Bulletin 2.68
Carmine C. Wainman4
Estimated H-index: 4
(University of Adelaide),
Peter J. McCabe20
Estimated H-index: 20
(University of Adelaide),
James L. Crowley19
Estimated H-index: 19
(BSU: Boise State University)
To better predict the architecture of reservoirs and the location of undiscovered resources in fluvial-dominated strata, a sound chronostratigraphic framework is needed. This study reassesses the stratigraphic framework of petroleum-bearing Jurassic fluviolacustrine successions in the Eromanga, Surat, and Clarence–Moreton Basins of eastern Australia. Correlation of the strata is challenging because of the heterolithic facies, the absence of conventional stratigraphic marker beds, and the longevi...
Published on Aug 1, 2017in Sedimentary Geology 3.24
Ryan T. Tucker5
Estimated H-index: 5
(Stellenbosch University),
Eric M. Roberts25
Estimated H-index: 25
(JCU: James Cook University)
+ 1 AuthorsSteven W. Salisbury18
Estimated H-index: 18
(UQ: University of Queensland)
The Winton Formation of central Queensland is recognized as a quintessential source of mid-Cretaceous terrestrial faunas and floras in Australia. However, sedimentological investigations linking fossil assemblages and palaeoenvironments across this unit remain limited. The intent of this study was to interpret depositional environments and improve stratigraphic correlations between multiple fossil localities within the preserved Winton Formation in the Eromanga Basin, including Isisford, Lark Qu...
Published on Sep 1, 2016in Geological Society of America Bulletin 3.97
Ryan T. Tucker5
Estimated H-index: 5
(JCU: James Cook University),
Eric M. Roberts25
Estimated H-index: 25
(JCU: James Cook University)
+ 1 AuthorsAnthony I.S. Kemp25
Estimated H-index: 25
(JCU: James Cook University)
U-Pb geochronology and Lu-Hf isotope analysis of detrital zircon from the mid-Cretaceous Winton and Mackunda Formations in the Eromanga Basin were employed to investigate regional provenance patterns in order to better understand the tectonic setting and paleogeography of eastern Australia during the late Mesozoic. A suite of Mesozoic-aged zircon populations recovered from these formations suggests that volcanism along the eastern margin of Australia was relatively continuous from the Triassic (...
Published on May 1, 2016in Chemical Geology 3.62
Carl Spandler27
Estimated H-index: 27
(JCU: James Cook University),
Johannes Hammerli7
Estimated H-index: 7
(JCU: James Cook University)
+ 4 AuthorsMark D. Schmitz37
Estimated H-index: 37
(BSU: Boise State University)
Abstract Titanite (sphene) has great potential as a petrogenetic indicator and mineral geochronometer, as it can host high concentrations of a range of trace elements and it occurs in diverse rock types. In this paper we describe a natural titanite standard material that may be used to calibrate chemical and isotopic analysis of titanite of varying age and origin. Through comprehensive bulk analysis of mm-size crystal fragments and in situ microanalysis, we show that the titanite, named MKED1, i...
Published on Mar 1, 2016in Geoscience frontiers 4.16
Jarred Lloyd1
Estimated H-index: 1
(University of Adelaide),
Alan S. Collins46
Estimated H-index: 46
(University of Adelaide)
+ 3 AuthorsAnthony Reid15
Estimated H-index: 15
(Government of South Australia)
Jarred Lloyd, Alan S. Collins, Justin L. Payne, Stijn Glorie, Simon Holford, Anthony J. Reid
Published on Oct 3, 2015in Australian Journal of Earth Sciences 1.28
Carmine C. Wainman4
Estimated H-index: 4
(University of Adelaide),
Peter J. McCabe20
Estimated H-index: 20
(University of Adelaide)
+ 1 AuthorsRobert S. Nicoll20
Estimated H-index: 20
(Geoscience Australia)
The Jurassic Walloon Coal Measures of the Surat Basin were previously estimated to be of Middle Jurassic age, ranging from Aalenian to Callovian, based on an uncalibrated eastern Australian biostratigraphic framework. New U–Pb dates of 162.55 ± 0.05 Ma and 158.86 ± 0.04 Ma obtained from zircons in ash-fall volcanic tuffs now place the Walloon Coal Measures of the Surat Basin in the Upper Jurassic Oxfordian. The new dates have several implications for the interpretation of the Jurassic strata in ...
Published on Sep 3, 2015in Journal of Vertebrate Paleontology 1.74
Oliver W. M. Rauhut28
Estimated H-index: 28
(LMU: Ludwig Maximilian University of Munich),
José L. Carballido14
Estimated H-index: 14
,
Diego Pol36
Estimated H-index: 36
ABSTRACTLate Jurassic dinosaur faunas from the Southern Hemisphere are still poorly known, and it thus remains unclear whether or not the famous Tendaguru fauna (Kimmeridgian–Tithonian, Tanzania) represents a typical Gondwanan dinosaur assemblage of that time. In South America, only the Oxfordian–Kimmeridgian Canadon Calcareo Formation of Chubut Province, Argentina, has yielded more than isolated Late Jurassic dinosaur remains so far. Here we report fragmentary remains of a dipolodocid sauropod ...
Published on Nov 17, 2014in Australian Journal of Earth Sciences 1.28
S.K. Hamilton7
Estimated H-index: 7
(UQ: University of Queensland),
Joan Esterle21
Estimated H-index: 21
(UQ: University of Queensland),
Renate Sliwa3
Estimated H-index: 3
The Middle Jurassic Walloon Subgroup is a prolific coal seam gas (CSG) resource in the Surat Basin, Queensland. Sedimentary framework models constrain stochastic reservoir models of the geological heterogeneity, but there is limited basin analysis information in the public domain. Here we present a regionally consistent stratigraphic framework model for the Walloon CSG play in the eastern Surat Basin. Lithostratigraphic correlation of open-file industry and government wireline logs supports the ...
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