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In Uncategorized
Because of isostasy a mountain will ultimately?
The isostasy of a mountain will make it ultimately be eroded to near sea level. This is considered science earth.
Results for: Isostasy
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In Physics
Isostasy is the balance between what two forces?
Gravity and buoyancy What two forces are balanced when a system is in isostasy? Downward gravity and upward buoyancy
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What is isostasy?
Isostasy is a term used in Geology to refer to the state of gravitational equilibrium between the earth's lithosphere (its crust) and asthenosphere (the rock below the crust) …such that the tectonic plates "float" at an elevation which depends on their thickness and density. This happens because the Earth's continents are made of minerals that are less dense than those that are found deeper in the Earth's crust. The continents are therefore floating. In the ice ages when the glaciers trapped large amounts of water on top of the continents, the continents became heavier and sank deeper into the asthenosphere below. (rather like pushing an floating ice cube down into a glass of cola). At the end of the ice age when the glaciers melted and retreated the continents began to float back up to their original level. (MORE)
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In Science
What are the three type of isostasy?
Three principal models of isostasy are: The Airy-Heiskanen Model - where different topographic heights are accommodated by changes in crustal thickness, in which …the crust has a constant density The Pratt-Hayford Model - where different topographic heights are accommodated by lateral changes in rock density. The Vening Meinesz, or Flexural Model - where the lithosphere acts as an elastic plate and its inherent rigidity distributes local topographic loads over a broad region by bending. (MORE)
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In Science
What is the difference between Pratt's and Airy's hypothesis of isostasy?
Pratt's hypothesis of isostacy proposed that topography is produced by crustal blocks with varying density, that terminate at a uniform depth whereas Airy's hypothesis of isot…acy, the mountain range can be thought of as a block of lithosphere (crust) floating in the asthenosphere (lava). Mountains have roots, while ocean basins have anti-roots. whereas (MORE)
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In Geology
How do you explain the theory of isostasy?
the theory of Isostacy is the theory that is used in the movement of the earth,the word itself Isostacy comes from two Greek words:iso meaning equal and Stotikos meaning balan…ce.Therefore Isostacy theory means equal balance or standing.Evidances on the theory of isostacy:presence of Rios and and Esturies in the coastland of Gambia and Sierra leone,Melting of ice sheet and Depression.Effects of the theory of Isostacy:May cause displacement of Lithosphere,Faulting leading to the formation of Block mountains and Rift valleys,foldings,Earth quakes and volcanic eruption.Importances of the theory of isostacy:Understanding the formation of different phenomena,Explain the concept that the crust floats on the mantle,predict future events eg floods,provide precautions to people on the effects of weather. (MORE)