Formation of iron sulfide at faecal pellets and other microniches within suboxic surface sediment

Anthony Stockdale, William Davison, Hao Zhang
  • Geochimica et Cosmochimica Acta, May 2010, Elsevier
  • DOI: 10.1016/j.gca.2010.02.005

Fossil creation from small-scale oxygen limitation in sediments

What is it about?

The traditional view of sediment, is as a system who's chemistry and biology steadily changes with depth. Little consideration was given to localised biology/chemistry that differed from what was expected at that depth. This study involved the use of a model developed in previous work, which allows us to predict what happens when highly reactive organic matter micro-environments occur in sediments.

Why is it important?

This is important as the existence of these environments could alter our view of how sediments are formed and layered and how organic matter is preserved - and ultimately fossilised. This also shows a route where dead organisms could be changed into pyrite and preserved in the sediment - even in oxygenated sediment where they would not be predicted to exist. This paper look at the range of conditions necessary for this preservation to occur.

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The following have contributed to this page: Anthony Stockdale