The environmental response of Middle Ordovician large organic walled microfossils from the Goldwyer and Nita Formations, Canning Basin, Western Australia

Winchester-Seeto, T.M.; Foster, C.B.; O'Leary, Teresa

doi:10.1016/s0034-6667(00)00060-9

Cited by 20 publications

(2 citation statements)

References 15 publications

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“…The Mid-and Upper Ordovician kukersite consisting of G. prisca has a wide geography. Besides Estonia and NW Russia kukersite is recorded in Australia [24,25], Canada [26,27] and USA [28]. In the geological sections of the East Baltic Basin the G. prisca oil shale occurs sporadically from the lower Darriwilian to uppermost Katian.…”

Section: Geological Backgroundmentioning

confidence: 99%

Nitrogen Isotopes in Kukersite and Black Shale Implying Ordovician-Silurian Seawater Redox Conditions

Kiipli¹,

Kiipli²

2013

Oil Shale

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For the first time data on nitrogen isotopes from the Ordovician-Silurian sedimentary rocks of the Baltic Basin are reported. Supplementary samples come from several regions worldwide. The data reveal the existence of different primary bioproductivity pathways in the Ordovician-Silurian. During the formation of black shale surface waters were oxygen-poor and maintained N 2 -fixing primary production indicated by δ 15 N -0.3‰ on average. The average δ 15 N of kukersite oil shale is +7.4‰. The positive δ 15 N values are in accordance with the formation of kukersite in oxic waters, showing that Gloeocapsomorpha prisca was a nitrate-using not N 2 -fixing cyanobacteriumlike organism. The black shale samples from the deep shelf suggest that seawater, including the photic zone, often suffered from deficiency of oxygen.

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Section: Geological Backgroundmentioning

confidence: 99%

Nitrogen Isotopes in Kukersite and Black Shale Implying Ordovician-Silurian Seawater Redox Conditions

Kiipli¹,

Kiipli²

2013

Oil Shale

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“…Palynological investigations are now firmly embedded in multidisciplinary geological studies, from those of academic interest to those on an industrial and societal scale, such as global climate change. The last 25 years have seen the hydrocarbon exploration industry continue to provide major impetus to palynology, especially in the context of sea-level change and the development of sequence stratigraphy -with papers by Parry et al (1981), Davies et al (1991), Gorin & Steffen (1991), collected papers in Katz & Pratt (1993), Partington et al (1993), Hart et al (1994), Achab et al (1997) and Winchester-Seeto et al (2000) providing some notable contributions in the areas of palynofacies, dinoflagellates, chitinozoa and sporomorphs. Techniques for the determination of thermal maturity have also 'matured' over the past 25 years, with quantified studies examining spore colour (Marshall, 1991;Yule et al, 2000), acritarch fluorescence (Obermajer et al, 1999) and chitinozoan reflectance (e.g.…”

Section: From Qualitative To Quantitative Isolation To Integrationmentioning

confidence: 99%

Celebrating 25 years of advances in micropalaeontology: a review

Gregory¹,

Armstrong

Boomer

et al. 2006

J. Micropalaeontol.

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INTRODUCTION (F. JOHN GREGORY)To commemorate the publication of the 25 th Volume of the Journal of Micropalaeontology, the first issue of which came out in 1982, this celebratory review article was commissioned. Officers of each TMS Group (Ostracod, Foraminifera, Palynology, Nannofossil, Microvertebrate and Silicofossil) were requested to reflect over the last 25 years and assess the major advances and innovations in each of their disciplines. It is obvious from the presentations that all Groups report that research has moved on from the basic, but essential descriptive phase, i.e. taxonomy and establishing biostratigraphies, to the utilization of new technologies and application to issues of the day such as climate change and global warming. However, we must not lose sight of the fact that the foundation of micropalaeontology is observation and the building block for all these new and exciting innovations and developments is still good taxonomy. Briefly, the most obvious conclusion that can be drawn from this review is that micropalaeontology as a science is in relatively good health, but we have to ensure that the reported advancements will sustain and progress our discipline. There is one issue that has not really been highlighted in these contributions -we need to make sure that there are enough people being trained in micropalaeontology to maintain development. The last 25 years has seen a dramatic decrease in the number of post-graduate MSc courses in micropalaeontology. For example, in the UK, in the 1980s and early 1990s there were five specific MSc courses to choose from (Hull, Southampton, Sheffield, Aberystwyth and UCL) now there is just one left, run jointly by UCL and the Natural History Museum, in London. This decrease occurred for a variety of reasons but was related initially to fluctuations in oil price, leading to a lack of stability and confidence in the oil industry which used to attract many postgraduates. Fortunately, there has been a recent trend to try and bolster student numbers with the introduction of multidisciplinary postgraduate courses which include an element of micropalaeontology, and there are more students entering the subject through PhD programmes than in the past.

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Infrared video microscopy—an efficient-method for the routine investigation of opaque organic-walled microfossils

Brocke

Wilde

2001

Facies

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The environmental response of Middle Ordovician large organic walled microfossils from the Goldwyer and Nita Formations, Canning Basin, Western Australia

Cited by 20 publications

References 15 publications

Nitrogen Isotopes in Kukersite and Black Shale Implying Ordovician-Silurian Seawater Redox Conditions

Nitrogen Isotopes in Kukersite and Black Shale Implying Ordovician-Silurian Seawater Redox Conditions

Celebrating 25 years of advances in micropalaeontology: a review

Infrared video microscopy—an efficient-method for the routine investigation of opaque organic-walled microfossils

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