Over 30 years ago, I was planting pines for paper companies in Ouachita Parrish Louisiana and had brought a book from home by a rich Englishman who visited Ouachita Parrish in 1833 and again in 1844. In 1833, he described it as rolling hills with trees that would take 8 men holding hands to reach around. In 1844 he described it as clear cut with gullies over 100 foot deep with petrified trees bridging them that you could drive a horse and wagon across. I was planting on a 1300 acre clear cut / burn site that was burned to bare ground and saw huge gullies with 6 to 8 ft. across petrified logs bridging them. It was like I had stepped back in time. One day on the site, I was hearing water running but there was nothing but bare ground as far as I could see. I kept planting and found a hole about 3 ft. across that went about 20 ft. down to a running underground stream. I had the willys until we finished the site.