Singtuen, V. and Seela, T. 2025. Petrographical and Geochemical Characteristics of Felsic Volcanic Rocks in the Upper Part of The Khorat Plateau, Thailand. Indonesian Journal on Geoscience. 12, 2 (Aug. 2025), 231–248. DOI:https://doi.org/10.17014/ijog.12.2.231-248.