A new Quaternary Stratigraphy of the Kallang River Basin, Singapore: Implications for Urban Development and Geotechnical Engineering in Singapore

•161 boreholes were used to create a 3D geological model of the Kallang River Basin, Singapore.•Two marine clay sequences, deposited during MIS 5e and the early Holocene, were observed for Singapore.•This model reveals new complexities deposited during marine transgression and regression phases.•A new stratigraphic framework and nomenclature for the wider Singapore is presented.