Page "Giant impact hypothesis" Paragraph 29

Other mechanisms that have been suggested at various times for the Moon's origin are that the Moon was spun off from the Earth's molten surface by centrifugal force, that it was formed elsewhere and subsequently, was captured by the Earth's gravitational field, or that the Moon formed at the same time and place as the Earth from the same accretion disk.

None of these hypotheses can account for the high angular momentum of the Earth – Moon system.