Trace Fossils of a Middle to Upper Ordovician Pelagic Deep-Ocean Bedded Chert in Southeastern Australia
Published:January 01, 2007
Yoshitaka Kakuwa, John Webb, 2007. "Trace Fossils of a Middle to Upper Ordovician Pelagic Deep-Ocean Bedded Chert in Southeastern Australia", Sediment–Organism Interactions: A Multifaceted Ichnology, Richard G. Bromley, Luis A. Buatois, Gabriela Mángano, Jorge F. Genise, Ricardo N. Melchor
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The uppermost Middle to lowermost Upper Ordovician succession of interbedded radiolarian chert and shales exposed at Seal Creek in southeastern Australia contains a diverse, abundant, and well-preserved trace-fossil assemblage that inhabited pelagic, deep-oceanic sediments on an abandoned section of a submarine fan complex. Trace fossils occur throughout the measured section, but the types and abundance of the trace fossils vary from horizon to horizon. Planolites and Palaeophycus are common in all chert beds, while Zoophycos, Alcyonidiopsis, Compaginatichnus-like, and Teichichnus-like trace fossils are limited to the upper part of the succession. Shales interbedded with the cherts have a much less...
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Sediment–Organism Interactions: A Multifaceted Ichnology
The field of Ichnology bridges the gap between the areas of paleontology and sedimentology, but has connections to many subdisciplines within these areas. Biogenic structures record the behavior of their tracemakers and provide valuable information in paleoecologic and paleoenvironmental analysis. As in situ ethologic structures, trace fossils or ichnofossils yield valuable insights into the paleoecology of ancient benthic communities and the environmental dynamics of depositional systems. Ichnology is truly a multifaceted field, and a broad selection of its facets is represented in the 28 papers of this volume. The papers are the product of Ichnia 2004, the First International Congress on Ichnology, convened by Jorge F. Genise and held from 19 to 23 April 2004 at the Museo Paleontológico Egidio Feruglio in Trelew, Patagonia, Argentina. Seven papers connected with the congress, containing ichnotaxonomy, were published separately, in Ichnos, volume 13, issue 4. Several symposium volumes, books, and short-course notes have been published in recent years and ichnology can be considered a particularly active research area in steady growth. The 28 papers herein are arranged in five groups that reveal the broad scope of ichnology.