Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Chromatograms of organic matter saturated hydrocarbons from different strata in the West Java Basin. (A,B) Sediment extract of the Talang Akar Formation, (C,D) sediment extract of the Banuwati Formation (modified from Napitupulu et al., 1997; Bagus et al., 2023) 9,22.