Figure 17. A plot of (C28+C29 Tricyclics)/TS vs. Dionsteriod Index. Both parameters are age-diagnostic biomarkers [53,54]

From

Molecular Organic Geochemistry of Mudstones from Koum Basin, Cameroon: Paleo-environmental, Age, Maturity and Genetic Implication

Nowel Yinkfu Njamnsi, Njoh Oliver Anoh, George Ngiamte Lemewihbwen, Cheo Emmanuel Suh, Simon Fai Tamfu

Journal of Geosciences and Geomatics. 2022, 10(1), 45-64 doi:10.12691/jgg-10-1-4