Changes

===Example: oil of terrestrial origin===

===Example: oil of terrestrial origin===

[[:file:oiloil-and-oilsource-rock-correlations_fig8-5.png|Figure 1]] is a gas chromatogram of a high-wax oil of terrestrial origin with an odd-carbon preference in the wax region and a high [[pristane-phytane ratio]] typical of coaly or certain nearshore aquatic environments. Significant input of terrigenous organic matter is indicated by a bimodal ''n''-alkane distribution (a second mode in the wax region, from ''n''-C₂₃ to ''n''-C₃₁), a pristane:phytane ratio greater than 2.0, and a strong odd-carbon ''n''-alkane dominance from ''n''-C₂₅ to ''n''-C₃₁. These features are characteristic of deltaic or lacustrine-sourced oils (in this case, from Indonesia).

[[:file:oiloil-and-oilsource-rock-correlations_fig8-5.png|Figure 1]] is a gas chromatogram of a high-wax oil of terrestrial origin with an odd-carbon preference in the wax region and a high [[pristane-phytane ratio]] typical of coaly or certain nearshore aquatic environments. Significant input of terrigenous organic matter is indicated by a bimodal ''n''-alkane distribution (a second mode in the wax region, from ''n''-C₂₃ to ''n''-C₃₁), a pristane:phytane ratio greater than 2.0, and a strong odd-carbon ''n''-alkane dominance from ''n''-C₂₅ to ''n''-C₃₁. These features are characteristic of [[Lithofacies_and_environmental_analysis_of_clastic_depositional_systems#Deltas|deltaic]]- or [[Lithofacies_and_environmental_analysis_of_clastic_depositional_systems#Lacustrine_deposits|lacustrine]]-sourced oils (in this case, from Indonesia).

===Example: oil of marine origin===

===Example: oil of marine origin===