move apart in plane of blatant impossibility

[yuguoguohjl]

What does the phrase 'move apart in planes' mean?
'The glittering sea rose up, moved apart in planes of blatant impossibility; the coral reef and the few, stunted palms that clung to the more elevated parts would float up into the sky, would quiver, be plucked apart, run like raindrops on a wire or be repeated as in an odd succession of mirrors.'

The sentence above comes from William Golding's book 'Lord of the flies'.

 

[wandle]

This is highly figurative language. It sounds like the sights imagined by someone in a feverish delirium.
'Moved apart in planes of blatant impossibility' means that the sea separated into different planes - levels, or surfaces - in a way that was obviously impossible.

 

[yuguoguohjl]

Thank you.