Hi Scott! I'm the newest member of the Rock Dust Group. I hope this becomes a valuable tool and an excellent platform to share ideas, practices and resources. Looking forward to participation. Please check out our website www.Rockdustlocal.com . We are working at making the materials available to farms and gardeners and locating regional and local sources whenever we get an inquiry from any locale.  I'm interested in creating some standards for best practices and getting the science involved. We do extensive analysis on the sources we locate and are participating in some research projects. So I hope the remineralization effort gets some traction in the US. Thanks for doing this.