Table 2 Fatty acid concentrations (ppm) flowing and dry acidic, ferric sulfate-rich streams.

From: The Fate of Lipid Biosignatures in a Mars-Analogue Sulfur Stream

Sample Code C16 FA C18 FA Total FA cm from W bank
Flowing stream
Acidophilic algae FlowAL 176.0 17.9 1530.8  
Bank sediment (W) FlowBS1a 158.3 104.3 679.3 0
  FlowBS1b 35.5 21.6 93.7  
  FlowBS2a 42.2 16.4 575.9 30
  FlowBS2b 6.8 4.5 36.6  
Matt over goethite FlowMG1a 173.3 38.7 572.3 85
  FlowMG1b 27.7 8.2 58.9  
  FlowMG1c 2.0 1.4 3.3  
  FlowMG2a 272.7 25.2 455.1 150
  FlowMG2b 11.3 4.3 42.6  
  FlowMG2c 1.9 1.2 3.1  
Wood over goethite FlowWG1a 60.4 41.6 196.4 190
  FlowWG1b 31.2 6.0 62.4  
  FlowWG1c 5.0 1.8 9.1  
  FlowWG1d 3.1 1.4 7.1  
Matt over jarosite FlowMJ1a 62.1 16.4 226.8 225
  FlowMJ1b 3.0 2.0 5.0  
  FlowMJ1c 2.3 1.4 18.7  
Wood over jarosite FlowWJ1a 13.3 4.2 76.9 260
  FlowWJ1b 4.9 2.2 13.3  
  FlowWJ1c 2.1 1.2 4.6  
Bank sediment (E) FlowBS3a 7.0 6.9 22.9 325
  FlowBS3b 5.7 3.6 103.6  
  FlowBS3c 2.9 1.9 75.8  
  FlowBS3d 6.1 4.2 11.2  
  FlowBS3e 3.6 3.2 25.9  
Quartz sand FlowQ1 4.1 1.7 5.8 380
Dry stream DryMJ1a 91.1 22.2 338.6  
  DryMJ1b 4.7 2.7 14.4  
  DryMJ1c 9.6 5.7 31.1  
  DryMJ1d 6.0 3.3 28.2