Mid Preorganic Crust Formation

Celestial

The hydrogen and helium in Oxidi's atmosphere was gradually replaced by heavier elements and molecules from protoplanetary debris impacts and eruption from the planet's interior, or reacting with heavier elements and being incorporated into larger molecules. Some of the lighter elements escaped the planet's gravity and took with it heat energy, causing the hot liquid planet to cool and it's surface to begin solidifying. The atmosphere remained thick on Oxidi, but the moon had almost lost it's atmosphere by the end of the Eon.   Heavy impacts from the planetary accretion disk, friction from the thick atmosphere and tidal forces from the moon slowed down the rate of rotation and while the planet crust was still soft and unstable, the planet's equator sunk closer to the core under it's own weight due to the lessened inertia to counter that effect. The result was a planet closer to spherical, but still with a visibly elliptical profile.