Comment on “Geochemistry of buried river sediments from Ghaggar Plains, NW India: Multi-proxy records of variations in provenance, paleoclimate, and paleovegetation patterns in the late quaternary” by Ajit Singh, Debajyoti Paul, Rajiv Sinha, Kristina J. Thomsen, Sanjeev Gupta - Clift, Peter; Giosan, Liviu; East, Amy E. (Palaeogeography, Palaeoclimatology, Palaeoecology, 2016)