[[:file:oiloil-and-oilsource-rock-correlations_fig8-28.png|Figure 6]] shows gammacerane in the m/z 191 mass chromatograms of two genetically related oils from southern Sicily. In this example, gammacerane elutes after the C<sub>31</sub> homohopanes. Note also the relative increase in the C<sub>34</sub> and C<sub>35</sub> homohopanes. The presence of gammacerane and the homohopane distribution suggest a strongly reducing, possibly carbonate or hypersaline depositional setting for the source rock of these oils. | [[:file:oiloil-and-oilsource-rock-correlations_fig8-28.png|Figure 6]] shows gammacerane in the m/z 191 mass chromatograms of two genetically related oils from southern Sicily. In this example, gammacerane elutes after the C<sub>31</sub> homohopanes. Note also the relative increase in the C<sub>34</sub> and C<sub>35</sub> homohopanes. The presence of gammacerane and the homohopane distribution suggest a strongly reducing, possibly carbonate or hypersaline depositional setting for the source rock of these oils. |