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flood basalt

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flood basalt
n
(Earth Sciences / Geological Science) a very extensive lava flow of basaltic composition that has issued from a fissure, often to be found as part of a series of such flows one on top of another, forming a plateau See fissure eruption


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Another sheet, discovered in western India and known as the Deccan flood basalt, is believed to have formed 66 million years ago.
The poorly understood relationship of plumes to Neogene continental margin uplift is also apparent in the close correlation of extreme topography to flood basalt exposures in both East and West Greenland.
Another large igneous province, the Columbia River continental flood basalt in the Pacific Northwest, encompasses only 3 percent of Ontong Java's volume.
 
 
 
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