Climatic control on the composition of Carboniferous-Permian Gondwana sediments, Khalaspir basin, Bangladesh

► Composition of Khalaspir Gondwana sediments was controlled by climatic fluctuation. ► CIA and MIA ratios of both sandstones and mudstones were used to reconstruct paleoclimates. ► New binary K2O/Al2O3-Ga/Rb model also reflects climatic shift.