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Earth Sciences & Geography - Geology | Devonian Paleoenvironments of Ohio

Devonian Paleoenvironments of Ohio

Bose, Rituparna

2013, XVII, 57 p. 44 illus., 38 illus. in color.

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  • Foreword by Prof. David A. T. Harper (President, International Palaeontological Association)
  • Traces the biodiversity loss and makes appropriate estimates for the present day biodiversity to help with predicting future biodiversities
  • Studies ecological interactions between host shells and episkeletobionts
  • Deals with the impact of the Phanerozoic mass extinctions
Carbonate depositional systems in the Paleozoic geologic time represent fewer studies in paleoecological interactions than the siliciclastic systems. To evaluate this difference, the paleontology of the Middle Devonian Dundee Formation in Ohio has been explored. This geologic formation represents an important environment in the Michigan Basin of North America. Understanding biotic relationships such as mutualism, commensalism, parasitism and predation in an ecological community is important in unraveling the mystery of the fossil record. This research has contributed a large field collection which will be useful in documenting the fossil content of this unit for future workers.

Rituparna Bose used new microscopic and imaging techniques in qualitatively analyzing the biotic interactions in small invertebrate shells. More importantly, she solved complex hypotheses in newly emerging problems in the field of geology and paleontology, such as the biodiversity crisis. Her study involved exploring the Devonian geology and paleontology of a geologic formation of a new unexplored quarry in Ohio, namely the Whitehouse Quarry in Lucas County, Ohio. She identified Devonian brachiopods to the genus level based on their morphology, and diagnosed paleoecological entities on host brachiopods and further measured episkeletobiont traces on hosts to understand the effects of environment and evolution on extinct species.

Such studies have implications in predicting future biodiversity, ecosystem conservation and climate change. This research will also assist future workers to compare the ecology of brachiopod hosts of the Dundee Limestone with that of other Devonian brachiopods, from both carbonate and siliciclastic settings.

Content Level » Research

Keywords » Biodiversity of Paleozoic Sedimentary Strata - Devonian Geology and Paleontology of Ohio - Dundee Formation - Encrustration on Non-brachiopod Hosts - Epizoan-host Relationships - Phanerozoic Mass Extinction - Traces on Rhipidomella Shells - Whitehouse Quarry

Related subjects » Ecology - Geology

Table of contents 

Research Objectives.- Geological Background.- Paleoenvironmental Interpretation of the Dundee Formation (Whitehouse Quarry).- Previous Paleontological Faunal List from the Dundee Formation.- Materials and Methods.- Results – Paleontological Analysis.- Taphonomy of Shells.- Trace Types.- Nature and Position of Traces on Rhipidomella Shells.- Encrustation of Trace-Makers.- Discussion.- Epizoan-Host Relationships.- Four Possible Causes for Rare Encrustation in the Dundee Formation.

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