That little navigational instrument in our noses, a speck of metal, no doubt had some effect upon the prehistoric colonizers, especially in locations, such as ours, that have high concentrations of magnetic iron ore. Extremely old igneous formations such as the batholiths like Enchanted Rock near Fredricksburg, Texas probably contain some of the radioactive minerals found at Barringer Hill. This may or may not have a bearing on the "ghost lights" observed since the mid-19th century there and at another formation near Marathon, Texas. Tectonic movement in quartz bearing formations near Abilene, Texas and Milburn, Oklahoma has been demonstrated in lab experiments to produce these "ghost lights" as well. A combination of these factors led me to start thinking that geology had something to do with cultural associations and selection of these locations.
> MGrant wrote:
> > An excellent considered reply as usual, Mr Campell. But do
> > think its possible that my interior sense were tweaked to
> > invite this association? Let me be perfectly clear, the
> > feeling was very palpable and totally real. The timing was
> > auspicious I think. But then again, maybe the magnetic effect
> > wore off? Can you see 'magnetism' causing a highly specific
> > localized sensation that would be limited to my left hand and
> > arm?
> Some people are sensitive to magnetic fields, Mark, just as
> many animals navigate by them. It's called magnetoception even
> though they don't have any idea why a magnetic field produces
> those effects.