Kent coastline of Kent is continuously changing, due to tectonic uplift and coastal erosion. Until about 960, the Isle of Thanet was an island, separated by the Wantsum channel, formed around a deposit of chalk; over time, the channels silted up with alluvium. Similarly Romney Marsh and Dungeness have been formed by accumulation of alluvium. Kent's principal river, the River Medway, rises near East Grinstead in Sussex and flows eastwards to Maidstone. Here it turns north and breaks through the North Downs at Rochester, then joins the estuary of the River Thames as its final tributary near Sheerness. The Medway is
Mattapoisett River Mattapoisett River The Mattapoisett River is an river in southeastern Massachusetts, in the United States. The river begins at Snipatuit Pond in Rochester and flows generally southwards through Mattapoisett to empty into Mattapoisett Harbor, an arm of Buzzards Bay. It flows through wetlands during much of its course. Historically, the Mattapoisett River has yielded the bay's most abundant herring populations. For example, town reports for 1906 recorded that the river's total catch was 626,000 alewives, and a further 465,000 alewives were noted in the 1907 report. In the referenced 1920's report the river served for "flooding cranberry bogs and for