Table 1. Summary of the environmental characteristics of the four depositional environments.

Temperature and pH are reported as the median and range during the exposure period except when only a single measurement was available (indicated as n.m.).

Environment	Terrestrial sand	Tidal zone	Submerged gyttja	Submerged sand
Temperature°C	12.9 (3.3–19.6)	10.1 (0.6–20.9)	10.0 (0.1–18.3)	10.8 (0.7–20.5)
pH	7.3 (6.1–8.4)	8.8 (n.m.)	7.2 (6.8–7.6)	7.2 (7.0–7.7)
Oxygen	Oxic	Oxic	Anoxic	Anoxic
Light	No	Yes	No	No
Water content	Fluctuating	Fluctuating	Waterlogged	Waterlogged