The investigation: Graphic shows the alternative possibilities. Either the visible crust is the oldest available to study and is perhaps as old as Mars, or an older crust underlying the visible surface has been detected, as the Freys assert.
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The investigation: Graphic shows the alternative possibilities. Either the visible crust is the oldest available to study and is perhaps as old as Mars, or an older crust underlying the visible surface has been detected, as the Freys assert. |
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