Went hunting in East Tn this weekend on a pasture called Government Hill. Heard rumors that an old Civil War campsite was supposed to be there. Didnt find a thing. Anyway, my question is, as i was checking the holes with the pro pointer i noticed the soil was driving it crazy. I could pick up a handfull of dirt and lay the pro pointer on it and it would sound off. This didnt happen on every hole. I was chasing ghosts for awhile till i realized what was happening. AT Pro would ground balance around 70. Anybody know whats in the dirt? It was a rich dark reddish color but not clay like. Heavy in minerals i suppose....kinda made the propointer useless.