I must say I was even surprised when we walked up to this mineral site. This has been out for about 5 weeks. 3 weeks ago it was 1/2" deep and about 10" across. It is now 8" deep and 15" across (aprox). This is in the middle of the forest floor with nothing around on a slope. My hunting partner is in the picture with the mineral site. As you can see our soil is poor and rocky (see the huge rock in the bottom of the mineral site they have dug around!!!