Common terminology describing the redox conditions in sedimentary environments and the metabolism of the corresponding microbial populations (biofacies)^3,64.

Depositional environment	Microbial biofacies	Oxygen content (ml l−1)
		Tyson and Pearson70	Demaison and More35
Oxic	Aerobic	>1	2–8
Dysoxic	Dysaerobic	0.1–1	0.2–2
Suboxic	Quasi-anaerobic	0.1–1	0–0.2
Anoxic	Anaerobic	0	0