Characteristics, distribution and morphogenesis of subtidal microbial systems in Shark Bay, Australia

Jahnert, Ricardo; Collins, Lindsay B.

doi:10.1016/j.margeo.2012.02.009

Cited by 172 publications

(157 citation statements)

References 32 publications

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“…δ 18 O and δ 13 C values of cap samples are not dissimilar to those characterizing the other subunits of the mushroom, suggesting that unusual evaporative regimes or unusual carbonate sources were not the key factor controlling its formation. The porous cerebroid-like morphology of the cap is similar to that of stromatolites and thrombolites that occur in the photic zone of marine embayments and lagoons (Jahnert and Collins, 2012;Bosak et al, 2013). The analogies with microbialites are even more evident at the microscopic scale.…”

Section: Model For Mushroom Speleothem Formationmentioning

confidence: 67%

“…Although these speleothems have been well-known by speleologists for decades, and Santa Catalina has been declared "National Monument" in 1996 (Watson et al, 1997;D'Angeli et al, 2015), the exact mechanism of their formation, as well as their petrography and mineralogy, remain virtually unstudied. Besides representing a yet uncharacterized type of speleothem, they are of utmost interest due to their uppermost unit (i.e., the mushroom cap), which is similar to stromatolitic and thrombolitic microbialites that form in the presence of microbial mats (Figures 1A,B; Jahnert and Collins, 2012;Bosak et al, 2013). Microbialites occur in a large variety of distinctive morphologies and are found in the geological record from the early Archean onwards (Grotzinger and Knoll, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs

et al. 2016

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Unusual speleothems resembling giant mushrooms occur in Cueva Grande de Santa Catalina, Cuba. Although these mineral buildups are considered a natural heritage, their composition and formation mechanism remain poorly understood. Here we characterize their morphology and mineralogy and present a model for their genesis. We propose that the mushrooms, which are mainly comprised of calcite and aragonite, formed during four different phases within an evolving cave environment. The stipe of the mushroom is an assemblage of three well-known speleothems: a stalagmite surrounded by calcite rafts that were subsequently encrusted by cave clouds (mammillaries). More peculiar is the cap of the mushroom, which is morphologically similar to cerebroid stromatolites and thrombolites of microbial origin occurring in marine environments. Scanning electron microscopy (SEM) investigations of this last unit revealed the presence of fossilized extracellular polymeric substances (EPS)-the constituents of biofilms and microbial mats. These organic microstructures are mineralized with Ca-carbonate, suggesting that the mushroom cap formed through a microbially-influenced mineralization process. The existence of cerebroid Ca-carbonate buildups forming in dark caves (i.e., in the absence of phototrophs) has interesting implications for the study of fossil microbialites preserved in ancient rocks, which are today considered as one of the earliest evidence for life on Earth.

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Section: Model For Mushroom Speleothem Formationmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs

et al. 2016

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“…This difference in grain-size has been noted in present-day marine coarse-grained carbonate stromato lites formed by stabilisation (trapping and binding) of previously mo bile grains by microbial mats (Logan, 1961;Monty, 1976;Dravis, 1983;Reid and Browne, 1991;Riding et al, 1991a;Reid et al, 1999). In these examples, grain-trapping is produced by erect filaments, mat ir regularities, and extracellular polymeric substances (EPS) secreted by cyanobacteria and other mat microbes (Logan, 1961;Playford and Cockbain, 1976;Dravis, 1983;Dill et al, 1986;Awramik and Riding, 1988;Riding et al, 1991a;Visscher et al, 1998;Reid et al, 2000;Decho et al, 2005;Dupraz et al, 2009;Browne, 2011;Bowlin et al, 2012;jahnert and Collins, 2012). Rare filaments in some mixed laminae of the Leza coarse-grained stromatolites (Fig.…”

Section: Grain-rich Laminaementioning

confidence: 93%

Origin and significance of lamination in Lower Cretaceous stromatolites and proposal for a quantitative approach

Suárez-González

Quijada

Benito

et al. 2014

Sedimentary Geology

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“…Fossilized stromatolites reefs found in Shark Bay, Western Australia have provided great insights into primitive microbial life, which can be comparable to some of living stromatolites that have been found in recent times e.g. hot springs of Yellowstone National Park (Jahnert and Collins, 2012;Berelson et al, 2011). Fossilized stromatolites are petrological structures that represent lithified forms of microbial life observed in rocks aged 3.6 billion years old.…”

Section: Predicted Social Behaviours In Primitive Microorganismsmentioning

confidence: 96%

Is it Quantum Sentience or Quantum Consciousness? A Review of Social Behaviours Observed in Primitive and Present-Day Microorganisms

Pereira

2015

Neuroquantology

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Social and intelligent behavioural designs have been observed in primitive and present day microorganisms in all three kingdoms of life. These behavioural patterns help microorganisms, to understand, evaluate and judge their constantly varying environment. Behaviour is represented as conscious moment, which occurs due to an event, which may be intentional or unintentional. Microorganisms have the capability of displaying behaviours, which can be compared to cognitive actions of the neural system in higher organisms. This review is a collection of social behaviours observed in present-day microorganisms as well as predicted behaviours in microfossils that have been studied so far. The intent of this review is to prove the origin and existence of consciousness or sentient awareness in microorganisms based on which these social behaviours originated and its comparison to multifaceted conscious behaviours observed in higher beings; its correlation to quantum generated consciousness which enables organisms to understand and judge perceptions, which gives the organism a prospect to behave as per will.

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Characteristics, distribution and morphogenesis of subtidal microbial systems in Shark Bay, Australia

Cited by 172 publications

References 32 publications

Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs

Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs

Origin and significance of lamination in Lower Cretaceous stromatolites and proposal for a quantitative approach

Is it Quantum Sentience or Quantum Consciousness? A Review of Social Behaviours Observed in Primitive and Present-Day Microorganisms

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