Fig. 2. A columnar section showing lithologic variations from core AA-1 in the Asem-Asem Basin, Southeast, Indonesia. Core sediments were divided into basement, clastic sedimentary rocks (Sedimentary Unit-1; SU-1), and limestone (Sedimentary Unit-2; SU-2). A prominent unconformity was developed between the basement and SU-1. Coal and coaly shale were only identified from SU-1a, and the six coalbed gas samples were collected from the lower part of SU-1a from core AA-1.

Econ. Environ. Geol. 2022;55:261-71 https://doi.org/10.9719/EEG.2022.55.3.261

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