New answers tagged geochemistry
1
The earth condensed from gas into liquid into solid.
Rocks are assumed to be solids and not a fluid part of a melt.
Bowens Reaction Series implies that the first rocks on earth would have been Olivine Polymorphs.
MgSiO3-perovskite and MgO (periclase) are likely candidates from observations at the Earths Moho.
As far as the "rock cycle" goes; these ...
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