Figure 6. Ternary plot of normalized solvent extract C15+ saturates, aromatic, resins, and asphaltenes results from gravimetric column chromatography (US Geological Survey-Lakewood) and medium pressure liquid chromatography (Weatherford). Data for eastern Ohio Devonian and lower Paleozoic samples from GeoMark (2015); Huron and Marcellus data (dots) from this study. Arom = aromatic; avg. = average; NSO+Asph = resins plus asphaltenes; Sat = saturate.