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Ria – Coastal inlet formed by the partial submergence of an unglaciated river valley; River delta – Silt deposition landform at the mouth of a river; Salt marsh – Coastal ecosystem between land and open saltwater that is regularly flooded; Sea cave – Cave formed by the wave action of the sea and located along present or former coastlines
Niagara Gorge is an 11 km (6.8 mi) long canyon carved by the Niagara River along the Canada–United States border, between the U.S. state of New York and the Canadian province of Ontario. [1] It begins at the base of Niagara Falls and ends downriver at the edge of the geological formation known as the Niagara Escarpment near Queenston, Ontario ...
The Columbia River Gorge is a canyon of the Columbia River in the Pacific Northwest of the United States. Up to 4,000 feet (1,200 m) deep, the canyon stretches for over eighty miles (130 km) as the river winds westward through the Cascade Range, forming the boundary between the state of Washington to the north and Oregon to the south. [1]
All three formations were laid down in an ancient sea, their differences of character deriving from changing conditions within that sea. About 10,900 years ago, the Niagara Falls was between present-day Queenston, Ontario , and Lewiston, New York , but erosion of the crest caused the falls to retreat approximately 10.9 kilometres (6.8 mi ...
Manawatu Gorge viewed from a lookout on the Manawatu Gorge Track. The Manawatū Gorge (Māori: Te Āpiti) is a steep-sided gorge formed by the Manawatū River in the North Island of New Zealand. At 6 km (3.7 mi) long, the Manawatū Gorge divides the Ruahine and Tararua Ranges, linking the Manawatū and Tararua Districts.
Another reason hanging valleys may form is where two rivers join and one is flowing faster than the other. [10] When warm and cold water meets by a gorge in the ocean, large underwater waterfalls can form as the cold water rushes to the bottom. [11]
Grand Canyon, Arizona, at the confluence of the Colorado River and Little Colorado River.. A canyon (from Spanish: cañón; archaic British English spelling: cañon), [1] gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. [2]
The Island Archway was a 25 metre high, naturally formed rock arch that lay off Loch Ard Gorge, a bay on the south coast of Victoria, Australia. The gate collapsed on 10 June 2009. The arch of rock exposed in the water has been frequently photographed by the numerous international and domestic tourists vacationing in the Great Ocean Road area ...