Early Triassic (early Olenekian) life in the interior of East Gondwana: mixed marine–terrestrial biota from the Kockatea Shale, Western Australia

Haig, David W.; Martin, Sarah K.; Mory, Arthur J.; McLoughlin, Stephen; Backhouse, John; Berrell, Rodney W.; Kear, Benjamin P.; Hall, Russell L.; Foster, C.B.; Shi, G.R.; Bevan, J. C.

doi:10.1016/j.palaeo.2014.10.015

Cited by 53 publications

(23 citation statements)

References 99 publications

(133 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This conspicuous underrepresentation – which is likely not taphonomic because Palaeozoic encrusters possessed similar calcitic skeletons65 and cemented to the substrate throughout the sessile phase of their life cycle – accords with extreme fluctuations in oceanic salinity66, de-oxygenation94067, intense weathering and run-off that are thought to have promoted widespread eutrophication and the proliferation of stromatolite-forming microbial substrates10112668 in the absence of mat-grazing organisms5569. Moreover, these markedly atypical conditions apparently favoured microconchids, which were ubiquitous across marine to brackish and even freshwater habitats367071 and readily colonized microbial/algal substrates, perhaps because of their stability and immediate supply of nutrients and oxygen3472. The propagation of these environments during the earliest Triassic could therefore explain the selective survival of microconchids versus other encrusting benthos, and otherwise reflects the ecosystem homogeneity that characterised the post P-T interval on a global scale.…”

Section: Discussionmentioning

confidence: 99%

Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction

Zatoń

Niedźwiedzki

Blom

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

The end-Permian mass extinction constituted the most devastating biotic crisis of the Phanerozoic. Its aftermath was characterized by harsh marine conditions incorporating volcanically induced oceanic warming, widespread anoxia and acidification. Bio-productivity accordingly experienced marked fluctuations. In particular, low palaeolatitude hard substrate communities from shallow seas fringing Western Pangaea and the Tethyan Realm were extremely impoverished, being dominated by monogeneric colonies of filter-feeding microconchid tubeworms. Here we present the first equivalent field data for Boreal hard substrate assemblages from the earliest Triassic (Induan) of East Greenland. This region bordered a discrete bio-realm situated at mid-high palaeolatitude (>30°N). Nevertheless, hard substrate biotas were compositionally identical to those from elsewhere, with microconchids encrusting Claraia bivalves and algal buildups on the sea floor. Biostratigraphical correlation further shows that Boreal microconchids underwent progressive tube modification and unique taxic diversification concordant with changing habitats over time. We interpret this as a post-extinction recovery and adaptive radiation sequence that mirrored coeval subequatorial faunas, and thus confirms hard substrate ecosystem depletion as a hallmark of the earliest Triassic interval globally.

show abstract

Section: Discussionmentioning

confidence: 99%

Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction

Zatoń

Niedźwiedzki

Blom

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the same time, studies have yielded many notable findings regarding depositional environments of marine or terrestrial shales, the formation conditions, accumulation mechanisms and enrichment patterns of shale gas, and the distribution of shale gas reservoirs 6–9 . However, to date, only a few geologists have investigated the geochemical and reservoir characteristics, gas-bearing conditions, shale gas accumulation conditions, and exploration prospects of transitional facies between marine and terrestrial environments 10,11 . The area investigated in this study is located in the Delingha depression of the Qaidam Basin in western China.…”

Section: Introductionmentioning

confidence: 99%

The origin, type and hydrocarbon generation potential of organic matter in a marine-continental transitional facies shale succession (Qaidam Basin, China)

Wang¹,

Sun²,

Shu-fang

et al. 2018

Sci Rep

View full text Add to dashboard Cite

This organic-rich shale was analyzed to determine the type, origin, maturity and depositional environment of the organic matter and to evaluate the hydrocarbon generation potential of the shale. This study is based on geochemical (total carbon content, Rock-Eval pyrolysis and the molecular composition of hydrocarbons) and whole-rock petrographic (maceral composition) analyses. The petrographic analyses show that the shale penetrated by the Chaiye 2 well contains large amounts of vitrinite and sapropelinite and that the organic matter within these rocks is type III and highly mature. The geochemical analyses show that these rocks are characterized by high total organic carbon contents and that the organic matter is derived from a mix of terrestrial and marine sources and highly mature. These geochemical characteristics are consistent with the results of the petrographic analyses. The large amounts of organic matter in the Carboniferous shale succession penetrated by the Chaiye 2 well may be due to good preservation under hypersaline lacustrine and anoxic marine conditions. Consequently, the studied shale possesses very good hydrocarbon generation potential because of the presence of large amounts of highly mature type III organic matter.

show abstract

“…Temperatures in the Early Triassic were elevated globally; equatorial temperatures exceeded the tolerance threshold of many plant and animal groups, resulting in sustained suppression of the ecosystem, but conditions at higher latitudes were more equable (Sun et al 2012, 2013, Metcalfe et al 2013, Haig et al 2015. The extreme climate resulted in a global 'coal gap' through the Early Triassic (Retallack et al 1996, Metcalfe et al 2015.…”

Section: Discussionmentioning

confidence: 99%

The Mesozoic megafossil genus Linguifolium Arber 1917

Pattemore¹,

Rigby²,

Playford³

2015

Acta Palaeobotanica

View full text Add to dashboard Cite

The plant megafossil genus Linguifolium Arber 1917 is chiefly known from the Middle and Upper Triassic of Gondwana. The range of Linguifolium extended beyond Gondwana by the Late Triassic, persisting there through the earliest Jurassic (Hettangian). The parent plants probably grew in a well-watered, canopied environment. Diagnoses of the genus and four of its species - Linguifolium tenison-woodsii (Shirley 1898) Retallack 1980, L. waitakiense Bell in Bell et al. 1956, L. parvum Holmes & Anderson in Holmes et al. 2010, and L. steinmannii (Solms-Laubach 1899) Arber 1917 - are emended with particular reference to venation and leaf morphology; consequently, the stratigraphic ranges of the species have been more precisely defined. Coalescent venation has previously been reported in some species of Linguifolium and is identified in new material described herein. Although the vast majority of specimens assigned to the genus are from the Upper Triassic, none shows coalescent venation. This character is entirely restricted to the Middle Triassic, in particular to two species: L. waitakiense and L. parvum. Linguifolium tenison-woodsii is restricted to the Carnian-lowermost Norian of Australia and South Africa and is recorded here for the first time from the Tarong Basin (upper Carnian), Queensland. Confusion regarding assignment of specimens to this species from the Middle Jurassic of Queensland is resolved.

show abstract

Early Triassic (early Olenekian) life in the interior of East Gondwana: mixed marine–terrestrial biota from the Kockatea Shale, Western Australia

Cited by 53 publications

References 99 publications

Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction

Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction

The origin, type and hydrocarbon generation potential of organic matter in a marine-continental transitional facies shale succession (Qaidam Basin, China)

The Mesozoic megafossil genus Linguifolium Arber 1917

Contact Info

Product

Resources

About