🌐EnglishEnglishDeutschFrançaisРусский中文日本語EntityQ2119891· pop 6· linked from 211 articlesBakken formationGeological rock formation known for crude oil productionConnectionsDevonianEntityUnited States Geological SurveyEntityCategoriesDeep marine depositsDevonian ManitobaDevonian MontanaDevonian North DakotaDevonian SaskatchewanDevonian System of North AmericaDolomite formations of CanadaDolomite formations of the United StatesGeologic formations of ManitobaGeologic formations of MontanaGeologic formations of North DakotaGeologic formations of Saskatchewan