Table 1 Select lipid biomarker ratios for thermal maturity, source biota, and depositional environmental assessments

From: Ediacara biota flourished in oligotrophic and bacterially dominated marine environments across Baltica

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  1. aHop/Ster is the ratio of major (C27–C35 hopane isomers)/(C27–C30 diasteranes and regular steranes)
  2. bC31 2-methylhopane index (2-MeH index) calculated as [(C31 2α-methylhopane+C31 2β-methylhopane)/(C31 2α-methylhopane+C31 2β-methylhopane+C30 αβ hopane)*100]
  3. cC31 3-methylhopane index (3-MeH index) calculated as [(C31 3β-methylhopane)/(C31 3β-methylhopane+C30 αβ hopane)*100]
  4. dRelative percent of C n steranes to total C27–C30 steranes
  5. e24-isopropylcholestane abbreviated as C30 ipc
  6. f24-n-propylcholestane abbreviated as C30 npc
  7. gNot detected (n.d.) indicates that the peaks were below MRM–GC–MS detection limits due to negligible abundance
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