Asteroid impacts significantly altered ancient Earth | #Geology - TopicsExpress

Asteroid impacts significantly altered ancient Earth | #Geology #GeologyPage New research shows that more than four billion years ago, the surface of Earth was heavily reprocessed -- or mixed, buried and melted -- as a result of giant asteroid impacts. A new terrestrial bombardment model based on existing lunar and terrestrial data sheds light on the role asteroid bombardments played in the geological evolution of the uppermost layers of the Hadean Earth (approximately 4 to 4.5 billion years ago). Read more : geologypage/2014/08/asteroid-impacts-significantly-altered.html Geology geologypage

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