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Spits are formed when longshore drift travels past a point (e.g. river mouth or re-entrant) where the dominant drift direction and shoreline do not veer in the same direction. [6] As well as dominant drift direction, spits are affected by the strength of wave-driven current, wave angle and the height of incoming waves. [7]
A spit may be considered a special form of a shoal. As spits grow, the water behind them is sheltered from wind and waves, and a salt marsh is likely to develop. Dungeness Spit in the Strait of Juan de Fuca, on the U.S. Pacific coast. Wave refraction can occur at the end of a spit, carrying sediment around the end to form a hook or recurved ...
Spits are formed by the process of longshore drift, in which waves impact the headland at a sharp angle, depositing sediment and causing the water's currents to transport the sediment down the beach, allowing it to accumulate in the area of the spit.
Toronto Islands (former spit, now detached), Toronto, Ontario; Leslie Street Spit, man-made spit created as part of new harbour project; Long Point, Ontario; Point Pelee, Ontario on Lake Erie; Rondeau Provincial Park - a crescentric sand spit on Lake Erie; Blackie Spit (east section of the Crescent Beach), South Surrey, British Columbia
Orford Ness is a cuspate foreland shingle spit on the Suffolk coast in Great Britain, linked to the mainland at Aldeburgh and stretching along the coast to Orford and down to North Weir Point, opposite Shingle Street. It is divided from the mainland by the River Alde, and was formed by longshore drift along the coast.
It has been estimated that there are 2.3 million m 3 (82 million ft 3) of shingle in the spit, [3] 97 per cent of which is derived from flint. [4] The Point was formed by longshore drift and this movement continues westward; the spit lengthened by 132.1 m (433 ft) between 1886 and 1925. [5]
The debate involving how cuspate forelands form is ongoing. [2] However, the most widely accepted process of formation involves long shore drift. [1] Where longshore drift occurs in opposite directions, two spits merge into a triangular protrusion along a coastline or lakeshore. [1]
Therefore, many spits stretch to the south into the sea and are continuations of the (right) river banks (see table and map). The Chushka and Tuzla spits are located inside the Strait of Kerch; the former spit is formed by the outflow of water from the Azov Sea to the Black Sea and therefore also faces south, whereas the latter is facing north ...