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An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. [1] Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone.
London Stone, Yantlet Creek. The transition between the Thames Estuary and the North Sea has been located at various notional boundaries, including: [1] The Yantlet Line between the Crow Stone (London Stone) on the northern foreshore at Chalkwell, Westcliff-on-Sea and another London Stone off the Isle of Grain, to the south.
The Chesapeake Bay (/ ˈ tʃ ɛ s ə p iː k / CHESS-ə-peek) is the largest estuary in the United States. The bay is located in the Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula, including parts of the Eastern Shore of Maryland, the Eastern Shore of Virginia, and the state of Delaware.
The site (Severn Estuary and Upper Severn Estuary) is listed in the 'Forest of Dean Local Plan Review' as a Key Wildlife Site (KWS). [ 20 ] Both SSSI citations provide detail of the geological and biological interest and of particular note is the international importance for wintering and wading birds of passage, [ 1 ] and of estuarine habits ...
A bay can be the estuary of a river, such as the Chesapeake Bay, an estuary of the Susquehanna River. [2] Bays may also be nested within each other; for example, James Bay is an arm of Hudson Bay in northeastern Canada. Some large bays, such as the Bay of Bengal and Hudson Bay, have varied marine geology. [citation needed]
The estuary begins at the eastern tip of Île d'Orléans, just downstream from Quebec City. [7] The river becomes tidal around Quebec City. [21] The St. Lawrence River runs 3,058 kilometres (1,900 mi) from the farthest headwater to the mouth and 1,197 km (743.8 mi) from the outflow of Lake Ontario. These numbers include the estuary; without the ...
Morecambe Bay is an estuary in north-west England, just to the south of the Lake District National Park. It is the largest expanse of intertidal mudflats and sand in the United Kingdom, covering a total area of 120 sq mi (310 km 2). In 1974, the second largest gas field in the UK was discovered 25 mi (40 km) west of Blackpool, with original ...
The result is often a very large estuary at the mouth of a relatively insignificant river (or else sediments would quickly fill the ria). The Kingsbridge Estuary in Devon, England, is an extreme example of a ria forming an estuary disproportionate to the size of its river; no significant river flows into it at all, only a number of small ...