Re: [Texascavers] cave mapping from the surface ?

2007-11-18 Thread Don Cooper
I read through the posts and especially liked the angle which Mark Minton re-approached the subject. If dowsing is actually done using these principles - (no matter how the technique is actually connected to the human machine) - it makes a whole lot more sense. I.E. The use of dowsing rods as a

[Texascavers] cave mapping from the surface ?

2007-11-15 Thread David Locklear
There was something in the news this week about the launching of a big research vessel that would map the underground layers of the earth as it traveled around the ocean. I barely caught a glimpse of the news story, but it indicated they could map deep voids in the earth. If this is true, do

Re: [Texascavers] cave mapping from the surface ?

2007-11-15 Thread Lyndon Tiu
Hi Dave, Petroleum geologist and geophysicists have been using various seismic methods to map the sub-surface since the end of WWII (plus/minus). The new ship probably has a more advanced/more capable version of an old technology. There other technologies. There is ground penetrating radar.

Re: [Texascavers] cave mapping from the surface ?

2007-11-15 Thread Lyndon Tiu
Once upon a time, when I was still in-school, we had a small ground penatrating radar (GPR) unit. As part of our lab work, we went to a garden on campus and proceeded to map the sub-surface using the unit. What we saw was that the ground we surveyed was solid for about 30 feet, but then it

Re: [Texascavers] cave mapping from the surface ?

2007-11-15 Thread John P Brooks
That doesn't seem like much fun. Wouldn't that take all the mystery and excitement out of cave exploration? I think we should protest this intrusion on our domain. David Locklear dlocklea...@gmail.com wrote: There was something in the news this week about the launching of a big research