yaydzi who cares, it's not a miracle
it's only in the 20th century that topography has been developt thx to satelites, and all that stuff...
If that was a miracle to convince his early believers or the believers after that for the next 1400 years, then Allah did a pretty lousy (edited by newseed) job... also because he didn't emphasize on "a land close by" or "lowest land whatever" was an insinuation that this was the lowest part of land on the entire planet. From my point of view it's just muhammed speculating about his current world events, other then that it's basiclly cheap speculation of modern mullah's, to try and have some judeo-christian relevance, since in judeo-christian theology all it's authority is based upon signs of divinity... based upon prophecies and miracles... unfortenatly the quran has none...
so they discuss mathematical number 19's wich noone really grasps the meaning of, but if you discuss it hard enough maybe you can throw the poor would be convert into confusion to your advantage... or you can always say to them "hey we have a better religion, look we have embryology!" (alltough we muslims don't really care about life)
and then you have the other miracles to ensure the muslims of it's truthfullness, these are most of the time completely ridiculous or insulting to science... like praying trees and allah worshipping tomatoes