Fig. 4: Ternary diagram depicting C27, C28, and C29 sterane distributions derived from the microbial mats.
From: Biosignatures of diverse eukaryotic life from a Snowball Earth analogue environment in Antarctica
Hydrogenated relict microbial mat steranes, noted by 1, are included as well as relict microbial mat steranes without hydrogenation, noted by F. Values were calculated using the relative intensities of ααα20R isomers. Ponds with conductivities >4000 µS/cm are noted with orange squares; ponds with conductivities <4000 µS/cm are noted with blue circles; ponds without conductivity information available are noted with white squares.
