Significance of subtidal microbial deposits in Shark Bay, Australia

Jahnert, Ricardo; Collins, Lindsay B.

doi:10.1016/j.margeo.2011.05.006

Cited by 91 publications

(63 citation statements)

References 17 publications

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“…During the latter part of the Quaternary, Shark Bay was characterised by three distinct marine transgressions O'Leary et al, 2008;Jahnert and Collins, 2011). The first phase led to the formation of the Peron Sandstone (Logan, 1968;Logan et al, 1970a), a red, quartz rich sandstone, exposed on the Peron and Nanga Peninsulas and in Faure and Pelican Islands (Table 1).…”

Section: Geology and Environmental Settingmentioning

confidence: 99%

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Stratigraphic architecture and evolution of a barrier seagrass bank in the mid-late Holocene, Shark Bay, Australia

Bufarale

Collins

2015

Marine Geology

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Section: Geology and Environmental Settingmentioning

confidence: 99%

“…Recent research has provided the first detailed regional evaluation of the subtidal microbial system and tidal flat evolution (Jahnert and Collins, 2011Collins and Jahnert, 2014).…”

Section: Introductionmentioning

confidence: 99%

Stratigraphic architecture and evolution of a barrier seagrass bank in the mid-late Holocene, Shark Bay, Australia

Bufarale

Collins

2015

Marine Geology

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“…These well-laminated stromatolites contained filamentous cyanobacteria that produce expolymers which trap sediments, favouring the formation of a flat surface [30]. The highly stratified mats contained four distinct layers (Fig.…”

Section: Sample Descriptionmentioning

confidence: 99%

Lipid Biomarker and Isotopic Study of Community Distribution and Biomarker Preservation in a Laminated Microbial Mat from Shark Bay, Western Australia

et al. 2015

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Modern microbial mats from Shark Bay present some structural similarities with ancient stromatolites; thus, the functionality of microbial communities and processes of diagenetic preservation of modern mats may provide an insight into ancient microbial assemblages and preservation. In this study, the vertical distribution of microbial communities was investigated in a well-laminated smooth mat from Shark Bay. Biolipid and compound-specific isotopic analyses were performed to investigate the distribution of microbial communities in four distinct layers of the mat. Biomarkers indicative of cyanobacteria were more abundant in the uppermost oxic layer. Diatom markers (e.g. C25 HBI alkene, C20:4ω6 and C20:5ω3 polar lipid fatty acids (PLFAs)) were also detected in high abundance in the uppermost layer, but also in the deepest layer under conditions of permanent darkness and anoxia, where they probably used NO3 (-) for respiration. CycC19:0, an abundant PLFA of purple sulfur bacteria (PSB), was detected in all layers and presented the most (13)C-depleted values of all PLFAs, consistent with photoautotrophic PSB. Sulfur-bound aliphatic and aromatic biomarkers were detected in all layers, highlighting the occurrence of early sulfurisation which may be an important mechanism in the sedimentary preservation of functional biolipids in living and, thus, also ancient mats.

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“…현생 미생물암 현존하는 해성 미생물암은 주로 오스트레일리아의 샤크만과 바하마에서 보고되었다 (Dravis, 1983;Dill et al, 1986;Reid et al, 1995Reid et al, , 2003Feldmann and McKenzie, 1998;Andres and Reid, 2006;Jahnert and Collins, 2011). 이들은 주로 생쇄설성 또는 어란성 퇴적물을 포함하며, 약한 엽층리 또는 엉김 구조를 형성한다.…”

Section: 지질시대에서 나타나는 미생물암unclassified

“…미생물암 에 대한 연구는 Kalkowsky(1908)가 트라이아스기 퇴 적층에서 얇은 엽층으로 이루어지고 위로 볼록한 퇴 적체를 인지하고, 이에 대해 스트로마톨라이트 (stromatolite)라는 용어를 제안하면서 이러한 구조가 미생물에 의해 만들어졌을 것이라고 제시한 데에서 시작되었다 (Paul and Peryt, 2000). 이후 오스트레일 리아의 샤크만(Shark Bay)과 바하마 등에서 현생 미 생물암이 발견되어 이에 대한 연구가 오늘날까지 지 속적으로 이루어지고 있다 (Dravis, 1983;Dill et al, 1986;Moore and Burne, 1994;Reid et al, 1995Reid et al, , 2003Ferris et al, 1997;Feldmann and McKenzie, 1998;Laval et al, 2000;Andres and Reid, 2006;Jahnert and Collins, 2011). 미생물암을 형성하는 미 생물들은 선캄브리아 시대에는 광합성을 통해 다량의 산소를 생성하여 오늘날과 같은 대기를 조성하는 데 크게 기여했으며, 또한 현생 산호초와 유사한 대규모 생물초(biogenic reef)를 형성하는 등 탄산염암의 퇴적 작용에도 깊이 관여하였다 (Riding, 2000;James and Wood, 2010).…”

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A Review on Microbialites: a Korean Perspective

Lee¹

2015

The Journal of the Petrological Society of Korea

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Microbialites are defined as rocks formed by microbial organisms. After their first appearance around 3.5 billion years ago, microbialites occur in various depositional environments throughout geological periods. Microbial organisms form microbialites by trapping and binding detrital sediments and/ or precipitating carbonate cements, resulting in formation of various microstructures and mesostructures. Four major types of microbialites are distinguished based on their mesostructures: stromatolite, thrombolite, dendrolite, and leiolite. In the geological records, occurrences of microbialites are influenced by calcium carbonate saturation of seawater and interaction of microbialites with metazoans. Stromatolites mainly flourished during the Precambrian, and diminished as level of atmospheric carbon dioxide declined. On the other hand, thrombolites, mainly formed by calcified microbes, began to flourish from the Neoproterozoic. As metazoans diversified in the Phanerozoic, proportion of the microbialites within sedimentary record declined. Since then, microbialites only occasionally flourished during the Phanerozoic, such as shortly after mass-extinction events. In the Korean Peninsula, microbialites occur in the Neoproterozoic Sangwon System, the Early Paleozoic Joseon Supergroup, and the Cretaceous Gyeongsang Supergroup, which form different shapes according to their age and depositional environments. By performing detailed studies on these Korean microbialites, it is possible to understand how microbes affected geological records and sedimentary environments, as well as their interaction with other organisms.

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Significance of subtidal microbial deposits in Shark Bay, Australia

Cited by 91 publications

References 17 publications

Stratigraphic architecture and evolution of a barrier seagrass bank in the mid-late Holocene, Shark Bay, Australia

Stratigraphic architecture and evolution of a barrier seagrass bank in the mid-late Holocene, Shark Bay, Australia

Lipid Biomarker and Isotopic Study of Community Distribution and Biomarker Preservation in a Laminated Microbial Mat from Shark Bay, Western Australia

A Review on Microbialites: a Korean Perspective

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