Robuta

https://commons.und.edu/theses/26/ "Methane potential of upper Fort Union formation sandstones, Campbell C" by Michael J. Blackstone Coalbed methane has been produced from the coalbeds of the Upper Fort Union Formation in the Powder River Basin for many years. The sandstones associated with... fort union formationby michaelmethanepotentialupper https://geodil.dperkins.org/h/2144.html #2144: Fort Union Formation Close-up of freshwater mollusks and mammal-bearing shell bed. Bed found on the eastern side of the Lebo Member of the Fort Union Formation exposure in the... fort union formation