WordGarden.ioplanation
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Meanings
Noun
the formation of a flat land surface by erosion and deposition
the developmental or evolutionary flattening of a three-dimensional structure
Beyond the definition
Imagine nature slowly smoothing rough land the way a sculptor smooths stone. That is planation: a geological process in which erosion wears down hills, mountains, and other high ground until the area becomes flat or gently sloping. It usually happens over a very long time. You may see signs of it in broad low surfaces shaped by rivers, waves, wind, or ice. The idea is simple: the land is gradually worn down into a more even surface.
Planation is the geological process by which an uneven landscape is worn down into a nearly flat or gently sloping surface. Picture a landform with hills, ridges, and high ground slowly losing its rough shape as erosion works on it year after year. Over a very long period, the relief becomes lower, smoother, and more even.
This is not a quick event. Important examples usually take thousands to millions of years to form. Rivers, glaciers, wind, and wave action can all play a part, depending on the landscape. These forces slowly remove material from higher places and reduce the contrast between high and low ground.
The term is mainly used in geology and geomorphology, especially in phrases like "planation surface," to describe land that has been worn down in this way. It is not a common everyday word, but it is useful when talking about how large landscapes change over time. In short, planation is nature's long, steady work of turning rough ground into a flatter, smoother surface.
Examples
- 1
Geological evidence
Geologists found evidence of planation in the smooth, high ground above the valley.
- 2
Raised surface
The old planation surface was later lifted, so rivers cut deep valleys into it.
- Domain
in geomorphology, a planation surface is a broad, almost flat land surface left after long-term erosion
- 3
Research explanation
The paper links the region’s flat hilltops to repeated cycles of planation and uplift.
See also
Similar
Shades of meaning
- denudation
- peneplanation
Contrast
Used with (collocations)
- planation surface
- marine planation
- erosional planation
Word family
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Forms and spellings
1 form open this card.
Main spelling
- planationnoun