rock drainage in the Dakota Formation and Graneros Shale, Jefferson County, Nebraska R.M. Joeckela,*, B...Natural Resources, University of Nebraska-Lincoln, Lincoln, NE 68588-0517, USA b Department of Biology, Doane...NE 68333-2430, USA c Pet Health Plus, 912 SW 74th Street, Oklahoma City, OK 73159, USA Accepted 1 June...the uppermost Dakota Formation and lower Graneros Shale (Cretaceous) near Fairbury, Nebraska, produces acid...and Al-sulfate minerals copiapite, alunogen, metahohmannite, coquimbite, paracoquimbite, and meta-alunogen |