Origin and Evolution of Earth:

Origin and Evolution of Earth:

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Questions about the origin and nature of Earth and the life on it have long preoccupied human thought and the scientific endeavor. Deciphering the planet's history and processes could improve the ability to predict catastrophes like earthquakes and volcanic eruptions, to manage Earth's resources, and to anticipate changes in climate and geologic processes. At the request of the U.S. Department of Energy, National Aeronautics and Space Administration, National Science Foundation, and U.S. Geological Survey, the National Research Council assembled a committee to propose and explore grand questions in geological and planetary science. This book captures, in a series of questions, the essential scientific challenges that constitute the frontier of Earth science at the start of the 21st century.how does the Underlying mantle influence continental Formation? Continental plates consist not only of crust but also of relatively cold underlying mantle. ... many places the oldest continental plates reach about 250 km or more in thickness, much greater than the thickest oceanic plates. ... In addition, despite their similar ages, the much more silicic composition of the overlying crust compared to the meltsanbsp;...

Title:Origin and Evolution of Earth:
Author:Committee on Grand Research Questions in the Solid-Earth Sciences, Board on Earth Sciences and Resources, Division on Earth and Life Studies, National Research Council
Publisher:National Academies Press - 2008-08-04


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