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A bathymetric map of the Mid-Atlantic Ridge (shown in light blue in the middle of the Atlantic Ocean). The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world.
A lee trough, also known as a dynamic trough, is "A pressure trough formed on the lee side of a mountain range in situations where the wind is blowing with a substantial component across the mountain ridge; often seen on United States weather maps east of the Rocky Mountains, and sometimes east of the Appalachians, where it is less pronounced."
Esker – Long, winding ridge of stratified sand and gravel associated with former glaciers; Exhumed river channel – Ridge of sandstone that remains when the softer flood plain mudstone is eroded away; Floodplain – Land adjacent to a water body which is flooded during periods of high water; Fluvial island – Exposed landmass within a river
An arête is a thin ridge of rock that is formed by glacial erosion. [2] Pressure ridge (ice) An ice pressure ridge is a ridge of deformed ice along the boundaries of individual ice floes when the ice floes on a lake or ocean collide and compress their edges. The average height of a sea ice pressure ridge is between 5 and 30 meters. [8]
Ridge and furrow is an archaeological pattern of ridges (Medieval Latin: sliones) and troughs created by a system of ploughing used in Europe during the Middle Ages, typical of the open-field system. It is also known as rig (or rigg ) and furrow , mostly in the North East of England and in Scotland.
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The channel on the crest of each ridge would overflow slowly down the sides (the panes) of the ridge, the channel eventually tapering to an end at the tip of the ridge. The seeping water would then collect between the ridges, in drains or drawns , these joining to form a bottom carrier or tail drain which returned the water to the river.
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