Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)


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Introduction

Geochemical indices of palaeo-oxygen levels are also reviewed. The recent renaissance in the development of criteria for the determination of palaeo-oxygen values has led to the recognition of a considerably greater variety of dysaerobic biofacies in the geological record.

This is illustrated with two case studies, the first, from the celebrated Burgess Shale of British Columbia, shows a depositional environment dominated by a fluctuating oxycline. The second case study, from widely separated earliest Triassic marine sections, illustrates the possibility of a widespread global dysoxic event at this time.

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The Middle Cambrian Burgess Shale was deposited under various levels of oxygenation. During periods of oxygenation, low-diversity shell beds were formed and the muds were colonized by infauna.

Under these circumstances pyrite was restricted to anoxic microenvironments and formed small 1 mm discrete aggregated masses. Soft-bodied organisms were preserved under low-oxygen conditions typified by evenly dispersed pyrite, and an absence of trace fossils and shell beds. The new, nongenetic, oxygen-restricted biofacies ORB scheme is also presented. Following an introductory review chapter, there are eleven contributions abstracted separately which draw on a host of geochemical, palaeoecological and palaeontological methods from traditional taxonomic uniformitarianism to more recently developed geochemical isotopic analyses.

The approach of the book is analytical rather than taxonomic. Using a number of methods, and comparing their results, allows different environmental controls to be isolated and provides more information on the record of past environmental parameters. Preservation of soft-bodied fossil biotas Konservat-Lagerstatten that preserve traces of volatile nonmineralized tissues readily degraded by bacteria are not evenly spaced through geologic time.

When compared to outcrop area, exceptional faunas appear to be over-represented in the Cambrian and Jurassic. These concentrations in time correspond to particular environments, indicating that controls on the distribution of exceptional faunas may have operated on a global scale.

The reduction in the number of exceptional faunas after the Cambrian may reflect the evolution and diversification of deep bioturbators.


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Specific conditions favoring stagnation and episodic burial were required to ensure preservation in younger rocks. Species diversity varies with latitude. A new plot of species diversity through the Phanerozoic takes into account the paleolatitudinal distribution of marine sedimentary rock. This plot indicates that the Permian witnessed the acme of species diversity prior to the Cretaceous, and that the Triassic recovery following the end-Permian extinction was much less pronounced than suggested by previous studies.

Allison PA, , Variation in rate of decay and disarticulation of echinodermata: implications for application of taphonomic data, Palaios , Vol: 5, Pages: This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters.

You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters. Publication Type Book Book chapter Conference paper Journal article Other Patent Poster Report Scholarly edition Software Thesis dissertation Working paper Year Filter from to Filter to Ichnofabrics and ichnofabric forming trace fossils in Phanerozoic turbidites, Bulletin of Canadian Petroleum Geology, 59 , Effaced preservation in the Ediacara biota and its implications for the early macrofossil record.

Download Marine Palaeoenvironmental Analysis From Fossils (Geological Society Special Publications)

Palaeontology, 54 , Phillips, C. Palaeogeography, Palaeoclimatology, Palaeoecology, , How does bioturbation influence reservoir quality? American Association of Petroleum Geologists Bulletin, 94, — Ecosystem engineering by bioturbating polychaetes in event bed microcosms. Palaios, 25, 46— Bromley and G. Pedersen [Palaeogeography, Palaeoclimatology, Palaeoecology —]. Palaeogeography, Palaeoclimatology, Palaeoecology, v.

Realistic interpretation of ichnofabrics and paleoecology of the pipe-rock biotope. Lethaia, 43, Ichnofabrics and biologically mediated changes in clay mineral assemblages from a deep-water, fine-grained, calcareous sedimentary succession: an example from the Upper Cretaceous Wyandot Formation, offshore Nova Scotia.

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Bulletin of Canadian Petroleum Geology, 58, Geology, 38, Biogenic cross lamination produced by the pistol shrimp Alpheus bellulus in microcosm experiments. Journal of Sedimentary Research, 80, Smothering of microbial mats by macrobiota: implications for the Ediacara biota. Journal of the Geological Society, London, , Palaeontologica Electronica. Ichnological analysis: the common ground between ichnofacies workers and ichnofabric analysts. In: Bromley, R. Lateral variability in shallow marine ichnofabrics: implications for the ichnofabric analysis method.

A discoid biota from the Neoproterozoic-Cambrian transition in the Amadeus Basin, central Australia: taphonomic and palaeobiological implications of diagenesis for Ediacaran fossil preservation. Precambrian Research, , A new method for the study of ichnofabric in cryptic highly lithified facies. Journal of Sedimentary Research, 76, The lower range of melanosclerites and foraminiferal linings extended to the Lower Cambrian.

References

Review of Palaeobotany and Palynology, , Discovery of a Zoophycos -group trace fossil? Atlantic Geology 42, Special Publication of the Geological Society, London, , Experimental production of clay rims by macrobiotic sediment ingestion and excretion processes.

Top 10 Methods to Find the Age of Rocks and Fossils (Part 1)

Journal of Sedimentary Research, 75, Geological Magazine, , Integrated modelling of Lajas Formation tide-dominated deltas Petroleum Geoscience, 11, Animal-sediment interactions: the effect of ingestion and excretion by worms on mineralogy. Biogeosciences, 1,

Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)
Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)
Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)
Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)
Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)
Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)
Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications) Marine Palaeoenvironmental Analysis from Fossils (Geological Society Special Publications)

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