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New insights on the geological evolution of palaeorivers and their relationship to Indus Civilization and Early Historic settlements on the plains of Haryana, NW India

The Quaternary sediments and landscapes of the plains of north-western Haryana and the ancient settlement mounds distributed across them have great potential to reveal the history of the evolution and disappearance of palaeorivers and their relationship to the Indus Civilization and Early Historic periods in northwest India. There are numerous palaeochannels in Haryana, and their distribution and burial in the subsurface creates difficulties for accessing the archives and proxies necessary for developing insight into the timing of river flow and shift, and its relationship to settled populations. This paper investigates the deep and shallow subsurface sedimentary lithology of an area around Sirsa that is close to the course of the modern Ghagghar River. The paper presents additional age constraints provided by dates from the site of Rakhigarhi and examines a sedimentary substrate of a new archeological mound situated on the palaeochannel identified at a mound near Dhir village. New AMS radiocarbon dates of drifted charcoal from natural and cultural strata suggest human activity and/or natural burning in this region as early as 10405 to 10190 cal BP (8455 to 8240 cal BC). The substrate sediments recorded at Dhir mound indicate flooding events after the urban phase of the Indus Civilization.Supplementary material at https://doi.org/10.6084/m9.figshare.c.5604984