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
Rochester, Kentucky 1839. It is named for Rochester, New York. Rochester is located in western Butler County at (37.210712, -86.892483). Its northwestern boundary, the Green River, is the county boundary as well, with Ohio County on the opposite side of the river. A small portion of the western boundary of the city is formed by the Mud River, which is also the boundary with Muhlenberg County. Kentucky Route 70 (Rochester Road) passes through the city, leading east to Morgantown, the Butler County seat, and west to Drakesboro. Kentucky Route 369 leaves Rochester to the north, crossing the Green River by the Rochester