Is there dry land on Earth if the moon orbits just above its Roche limit?

Imagine an Earth-like world in all respects except that the Moon is much much closer.

I think I'm right to say if the Moon were very close that tidal forces would slowly rob it of momentum and it would probably eventually hit the Earth destroying both. Although theoretically the Moon should be disrupted before it hit the Earth, (Earths radius 6371km, Moon radius 1737km, Moon's Roche limit 9492km) given its elliptical orbit and the extreme proximity I would have thought a collision was more or less unavoidable.

My question is this in the last one thousand years before impact (or disruption) is there any permanently dry land on Earth? And the related question do the oceans even behave like oceans as we would know them under these extreme conditions?

posted over 6 years ago

Slarty‭

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