It may be. I am not sure. I wasn't sure about the large rocks as they really aren't stacked up, just a layer of them. We think the gravels there are virgin & the area was not finished. I think it was partially hydraulicked & still has a bottom pay layer. There is quite a large area of this material. It is an the side of a faultline maybe a 45 degree angle where 60 ft is highest point. We sampled gold from the bottom to about 50 ft up anf 100 yds across>all good tests. The bedrock very's as it is broken up from the upheaval. I can't say for any certainty how deep the pay goes but if there is 5 or 10 ft of it it is big money. I guess that's what excavators are for or possibly drill a couple of areas to determine depth.