It is stated that the Earth is a 'squashed sphere' due to the very slight bulge at the equator. (Thought in reality it's such a small difference, it's essentially spherical)
Equatorial Diameter: 12,756 km Meridional Diameter: 12,714 km
I'm looking at why the Earth has this tiny bulge.
Some sources I read talk about the tidal effect from the moon. But others talk about the Earth spinning causing this.
The books I have (and videos I've watched) just talk about this things separately and don't really explain the difference
Surely the bulge due to a mixture of both? which one has a greater effect? Does the rotational bulge not effect the oceans or something? Does the tidal bulge only effect the water? I'm really confused