Fig. 5From: Origins of hydrocarbons in the Geneva Basin: insights from oil, gas and source rock organic geochemistrysource-rock maturity of the Lower Jurassic and Carboniferous units. Only samples with TOC > 0.5% are plotted in this graph. The blue shaded area encompasses available data for the Lower Jurassic Posidonia shales in the northwestern Swiss Molasse Basin (Todorov et al. 1993; Fantasia et al. 2019)Hydrogen Index (HI) vs. Tmax crossplot outlining the kerogen types andBack to article page