Archaeol: An Indicator of Methanogenesis in Water-Saturated Soils

<table>Partial total ion current (TIC) chromatogram of typical biomarker distribution at Caeau Ton-y-Fildre in simple lipid fraction. Inset: Partial chromatogram of selected ion monitoring (SIM) of <i>m/z</i> 130, 278, and 426 showing occurrence and structure of archaeol. A, 24-ethylcholesta-5,22-dien-3<i>β</i>-ol; B, 24-ethylcholest-5-en-3<i>β</i>-ol; C, 24-ethyl-5<i>α</i>-cholestan-3<i>β</i>-ol.</table>

Archaea

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Figure 2

Figure 2: Archaeol: An Indicator of Methanogenesis in Water-Saturated Soils 