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.
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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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This page is a summary of: Formation of iron sulfide at faecal pellets and other microniches within suboxic surface sediment, Geochimica et Cosmochimica Acta, May 2010, Elsevier,
DOI: 10.1016/j.gca.2010.02.005.
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