The Central Ganga Plain (CGP)—the middle sector of the Indo-Gangetic foreland basin—is a primary area of interest due to its thick and continuous Quaternary alluvial sediments. Its active tectonic setting, with rapid subsidence and structural segmentation, results in a continuous sedimentary record that provides clear evidence of past variability in monsoon and environmental changes. This article presents the reconstruction of the late Quaternary hydroclimatic variability during the last glacial maximum (LGM), post-LGM and the 4.2 ka events using multi-proxy analysis. During post-glacial climatic amelioration, a pronounced paleoenvironmental transition, with a sharp increase in total organic carbon (TOC) (3.97%), TC (6.29%) and C/S ratio (~300) around ~20 ka BP, reflecting enhanced organic productivity and freshwater deposition, is recorded. Mineral magnetism data reveal a significant increase in the concentration-dependent parameters (χlf (105.4 ×10 -8 m 3 kg -1 ); saturation isothermal remanent magnetisation (971 ×10 -5 Am 2 kg -1 ), ꭓARM (414 ×10 -5 Am 2 kg -1 )), recording a strong detrital input and monsoon weakening linked to regional aridification. The results align well with contemporaneous lake and fluvial records from the CGP.
Prasanna et al. (Wed,) studied this question.