Modern and ancient continental shelf anoxia: an overview

  title={Modern and ancient continental shelf anoxia: an overview},
  author={Richard V. Tyson and Thomas H. Pearson},
  journal={Geological Society, London, Special Publications},
  pages={1 - 24}
  • R. Tyson, T. Pearson
  • Published 1991
  • Environmental Science, Geography
  • Geological Society, London, Special Publications
Abstract The characteristics of mid-latitude shelf seas are primarily controlled by seasonal cyclicity in wind-driven mixing. Seasonal dysoxic-anoxic conditions may occur in summer in salinity-stratified estuarine or pro-delta settings, or more extensively in those open shelf areas where a total depth of ≤60 m and the seasonal thermocline result in a bottom water layer ≤10 m thick. When bottom circulation is limited the oxygen stored in this layer may become periodically exhausted if climatic… 

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