This is kind of amazing all by itself:
> The harrah near Madinah has been active for more than two million years, explains Mohammed-Rashad Moufti, a consultant to the Saudi Geological Survey (SGS)... Mohammed-Rashad Moufti holds Saudi Arabia’s first—and so far only—doctoral degree in volcanology. He has devoted 20 years to studying and promoting awareness of the lava field near Madinah, which is known as Harrat Rahat.
I have theorized that the parting of the Red Sea might have been caused by volcanic inflation. There was a volcano in Japan (Usu I think) which inflated not too long ago by about 300 feet in elevation. Since the Israelites were following a column of smoke by day and fire by night, there obviously was something volcanic going on in the area, where ever it was exactly.