Cyclic Deposition of the Devonian Catskill Delta of the Appalachians, USA

  1. P. L. de Boer2 and
  2. D. G. Smith3
  1. J. van Tassell

Published Online: 29 APR 2009

DOI: 10.1002/9781444304039.ch24

Orbital Forcing and Cyclic Sequences

Orbital Forcing and Cyclic Sequences

How to Cite

van Tassell, J. (2009) Cyclic Deposition of the Devonian Catskill Delta of the Appalachians, USA, in Orbital Forcing and Cyclic Sequences (eds P. L. de Boer and D. G. Smith), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304039.ch24

Editor Information

  1. 2

    Utrecht, The Netherlands

  2. 3

    London, UK

Author Information

  1. Eastern Oregon State College, La Grande, OR 97850-2899, USA

Publication History

  1. Published Online: 29 APR 2009
  2. Published Print: 28 JAN 1994

ISBN Information

Print ISBN: 9780632037360

Online ISBN: 9781444304039

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Keywords:

  • cyclic deposition of Devonian Catskill Delta;
  • catskill delta complex;
  • Devonian catskill delta cyclicity;
  • eustatic sea level variations;
  • tectonism

Summary

The Devonian Catskill Delta complex contains a complex hierarchy of cycles with periods ranging from 20 ka to 3.5 Ma. The origin of these cycles is controversial. Fluvial cycles, shelf storm beds and turbidites were deposited at intervals of 102 to 103 years along the Catskill Delta margin. Fluvial, shoreline, shelf, slope and basin deposits include cycles with periodicities in the order of 100 ka (sixth-order) and 400 ka (fifth-order) periodicities; 20-ka and 33-ka cycles may be superimposed on the 100-ka cycles, while 0.8–1.5 Ma (fourth-order) cycles and 2 Ma (third-order) cyclic variations in lithology and faunal extinctions may also be present in the Catskill Delta sequence. Some of these depositional cycles have been correlated throughout the Catskill Delta complex and related to global eustatic sea-level fluctuations. Further work is needed to confirm these correlations. Lateral facies shifting, periodic storm activity, tectonism, sea-level fluctuations and climatic change and related variations in sediment input interacted to produce the cycles present in the Catskill Delta complex. The nested hierarchy of cycles present suggests the influence of climate, sea level and sediment input fluctuations triggered by Milankovitch orbital variations ranging from 20 ka to 2.0 Ma.