Journal ArticleDOI
Characteristic trace-fossil associations in oxygen-poor sedimentary environments
Allan A. Ekdale,T. R. Mason +1 more
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In this paper, an oxygen-controlled trace-fossil model is proposed for the sedimentologic record of oxygen-poor depositional environments typically includes trace fossils produced by deposit-feeding organisms.Abstract:
The sedimentologic record of oxygen-poor depositional environments typically includes trace fossils produced by deposit-feeding organisms. We propose an oxygen-controlled trace-fossil model in which increasing oxygen concentration of interstitial water in sediment parallels a transition from fodinichnia-dominated through pascichnia-dominated to domichnia-dominated trace-fossil associations. In certain places, such as parts of the late Paleozoic Oquirrh Basin in Utah, this model provides a reasonable alternative to the more traditional, depth-controlled model of trace-fossil distribution.read more
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Journal ArticleDOI
Trace-element behavior and redox facies in core shales of Upper Pennsylvanian Kansas-type cyclothems
Thomas J. Algeo,J. Barry Maynard +1 more
TL;DR: In this paper, the authors developed a multiproxy technique for assessing redox facies in black shale samples: euxinic conditions were considered to have existed if at least two of four trace-indicator trace elements (Mo, U, V, Zn, and Pb), and nonsulfidic anoxic conditions were inferred otherwise.
Journal ArticleDOI
Description and analysis of bioturbation and ichnofabric
A. M. Taylor,Roland Goldring +1 more
TL;DR: In this paper, a new scheme for the description and analysis of bioturbation and the resultant ichnofabrics is proposed, which can be used in core and field-based studies and consists of two parts.
Book ChapterDOI
Oxygen minimum zone Benthos: Adaptation and community response to hypoxia
TL;DR: Mid-water oxygen minima intercept the continental margins along much of the eastern Pacific Ocean, off west Africa and in the Arabian Sea and Bay of Bengal, creating extensive stretches of sea floor exposed to permanent, severe oxygen depletion, and may preview the types of adaptations, species, and processes that will prevail with increasing hypoxia over ecological and evolution- ary time.
Book
Ichnology: Organism-Substrate Interactions in Space and Time
TL;DR: In this article, a detailed analysis of the ichnology of a range of depositional environments is presented using examples from the Precambrian to the recent, and the use of trace fossils in facies analysis and sequence stratigraphy is discussed.
Journal ArticleDOI
Contourites and associated sediments controlled by deep-water circulation processes: State-of-the-art and future considerations
TL;DR: The contourite paradigm was conceived a few decades ago, yet there remains a need to establish a sound connection between contourites, basin evolution and oceanographic processes.