Principles of Ichnostratigraphy
Published:January 01, 2007
Adolf Seilacher, 2007. "Principles of Ichnostratigraphy", Sediment–Organism Interactions: A Multifaceted Ichnology, Richard G. Bromley, Luis A. Buatois, Gabriela Mángano, Jorge F. Genise, Ricardo N. Melchor
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Invertebrate trace fossils are usually considered as stratigraphically less useful than vertebrate footprints. This is because they commonly lack diagnostic “fingerprints”, which are more closely related to the anatomy of the producer than to the biological purpose, or function, of the trace. Exceptions are trilobite burrows (Cruziana) , arthrophycid burrows, ichnospecies of Oldhamia, and Treptichnus pedum. Even if their makers are unknown, they represent taxonomically coherent groups of animals, whose evolving behavior marks geologic time. Cruziana ichnospecies can also be used in paleogeography.
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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.