The Dynamics of Rapid, Asynchronous Biotic Turnover in the Middle Devonian Appalachian Basin of New York

 
 
 
 

The Dynamics of Rapid, Asynchronous Biotic Turnover in the Middle Devonian Appalachian Basin of New York

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dc.contributor.advisor Brett, Dr. Carlton E. en_US
dc.contributor.author Sessa, Jocelyn en_US
dc.date.accessioned 2009-04-10T01:51:55Z
dc.date.available 2009-04-10T01:51:55Z
dc.date.created 2003 en_US
dc.date.issued 2009-04-10T01:51:55Z
dc.identifier.uri http://rave.ohiolink.edu/etdc/view?acc_num=ucin1054576413 en_US
dc.identifier.uri http://hdl.handle.net/2374.OX/105975
dc.description High resolution stratigraphic and paleoecological analyses of regional biotic turnovers can reveal much about their evolutionary and ecological processes. Biotic turnover in the Devonian of the Appalachian Basin was investigated to determine whether taxonomic replacement across a key boundary was: 1) abrupt or gradual; 2) synchronous across the basin. Analyses of abundance data that reveal a depth-controlled gradient persisted, with moderate variation, until just prior to the boundary. Two biotic assemblages occur above and below the boundary, while another occurs only above it. Turnover was asynchronous; certain assemblages appeared earlier than others. Above the boundary, a unique assemblage appeared abruptly, another assemblage appeared gradually, and a third remained unchanged. Taxonomic composition was controlled by sedimentologic/environmental variables; specific faunas occur in particular lithofacies. Many taxa were not facies restricted, and occurred in many environments, but their abundance varied significantly. Taxon abundance and paleoenvironmental context is therefore important for understanding biotic transitions. en_US
dc.format application/pdf en_US
dc.format 86p. en_US
dc.rights unrestricted en_US
dc.rights Copyright and permissions information available at the source archive en_US
dc.subject Hamilton Group en_US
dc.subject Tully Limestone en_US
dc.subject Tully Formation en_US
dc.subject paleoecology en_US
dc.subject Middle Devonian en_US
dc.subject New York en_US
dc.title The Dynamics of Rapid, Asynchronous Biotic Turnover in the Middle Devonian Appalachian Basin of New York en_US
dc.type Electronic Thesis or Dissertation en_US
dc.degree.name MS en_US
dc.degree.level masters en_US
dc.degree.discipline Arts & Sciences : Geology en_US
dc.degree.grantor University of Cincinnati en_US
dc.contributor.publisher University of Cincinnati / OhioLINK en_US

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