07-03-2016, 07:03 AM
The deepest ocean would be a globe of pure water; we have one of those in the scenario. Tangaroa is a ball of pure water, about the biggest you can get without having high-pressure ice at the centre.
You could, I suppose, float a ball of low-pressure ice in such an ocean, but the mere presence of so much ice in that sphere of water would change the characteristics of the world - the low pressure ice would float on the surface of the water, and the increased mass would cause high-pressure ice to form at the core- so you'd end up with a triple-layer world; an icy outer layer, a water ocean and ice again at the core.
You could, I suppose, float a ball of low-pressure ice in such an ocean, but the mere presence of so much ice in that sphere of water would change the characteristics of the world - the low pressure ice would float on the surface of the water, and the increased mass would cause high-pressure ice to form at the core- so you'd end up with a triple-layer world; an icy outer layer, a water ocean and ice again at the core.