From a mining aspect, Jared’s comment that you posted is correct. And anyone who knows about weight and water flow would agree. The more mineralization in a rock the heavier it is and the heavier it is the less of a chance it would ever move from its position. I personally have rocks in secure storage, from dump piles that were extracted from tunnels in the 1930’s, that never moved their position in over 90 years. Most of them weigh more that 8x what the should being of shale. Don’t listen to the bashers they are here to drive the price down so they can make the spread. No one is out here supporting or bashing unless they are here to make money!