Hi Bill, Marble canyon gold is 70 to 115ft down in the bottom there are 3000ft of drifts on the bedrock It came from a ancient river bed still sections left up by Crooked creek 10,000 ft up but it is now in a wilderness area. Used to be placer claims on the hills surrounding marble canyon especially in the area where the road drops into the canyon, they are not in the D.V. park area. Check out the closed claims there.. North east of Chalfant are the Springs claims now closed. Some nice nuggets have been found there years ago, but steep rugged terrain. Don't give up on Mazourka there is gold there. One of the largest called the 3 finger nugget was a sun baker that came off the top off a mountain. Dennis and I know some areas up there that we have found gold in we just have not been able to get up there yet. You also have the Lida area Gold point and the Tule placers all have produced nuggets and it is high country been there when it was 105 in lone Pine and only 80 up there. You live in a great area to find gold not far from you. Good luck!