Fig. 6From: Preserved organic matter in a fossil Ocean Continent Transition in the Alps: the example of Totalp, SE SwitzerlandThermal maturity parameters of C27 steranes for Totalp samples. The classification is from Peters et al. 2005a. The brown shaded area represents the range of complete isomerization for the 20S/(20S + 20R) ααα C27 steranes (ca. 55%) and αββ/(ααα + αββ) C27 steranes (ca. 68%)Back to article page