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Earth science

When crust is bred

An analysis of the distribution of helium-isotope ratios in oceanic extrusions from Earth's mantle seems to establish a connection with the spread of ages in continental crust. What mechanism might underlie this?

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Figure 1: Island sources for crustal growth.


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Porcelli, D. When crust is bred. Nature 446, 863–864 (2007).

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