Did you see the October 2002 issue of Bicycling Magazine that shows the mountain biker grinding up the delicate face of an ancient and rare rock formation?
Do you have information about this area? What leads you to believe it is ancient and rare? Quite a bit of the extreme riding you see in the Kranked videos, and what not, are done in man made areas like huge gravel pits. Personally, I think Bicycling magazine is a cheese rag anyway - a good form of protest would be not to buy it.