Evidence for Seawater Retreat With Advent of Meghalayan Era (?4200 a BP) in a Coastal Harappan Settlement

The transformation of mature (urbanized) phase the ancient Indus civilisation between ?4200 and 3800 years Before Present (yr BP) overlaps with beginning Meghalayan Age (?4200 ± 100 yr BP). Though exact cause(s) for decline urbanized are not yet clear, researchers continue to debate whether monsoonal dryness was sole cause or several other regional factors manifested in a compounding manner. Here, we show relative sea level fall downstream area habitation (south-western Gujarat region) which initiated at 4150 230 continued up 3625 200 BP. We provide multi-proxy (chronological, sedimentological, mineralogical, isotopic elemental abundance) data set from well-dated vertical sediment trench Lothal (ancient dockyard era) support this inference. Chief proxies used inferring were bulk carbon sulfur contents along their stable isotopes (?13C ?34S) foraminiferal assemblage. conspicuous shifts majority hint lowering stand that likely dried Harappan (used trade). Findings our study possess implications Holocene climate changes plausible impact(s) on trade culture. Additionally, it invites evidences large scale geological BP distinct era.