Fig. S1. Linear relation between Lost City alkane concentrations from Proskurowski et al., 2008.
(A) CH₄ and C₂H₆, (B) CH₄ and (C) C₃H₈. Error bars represent 7-10% error in C2-C4
alkane measurements, and 2% error in CH₄ measurement. (D) Average Lost City alkane
concentration (nmol/kg) plotted on a log scale vs carbon number. The observed trend is
consistent with an Anderson-Schulz-Flory distribution, compatible with step-growth
polymerization during formation by Fischer-Tropsch type reactions. Methane is elevated
with respect to the typical distribution, as indicated by the arrow.

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Date: 2010-03-27

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