Wisconsin
preferred label: ویسکونزین @fa
type: Concept
related: Millbrig Bentonite Bed

Illinois
preferred label: ایلینویز @fa
type: Concept
related: Millbrig Bentonite Bed

Millbrig Bentonite Bed
related: Iowa
related: Illinois
related: Minnesota
related: Decorah Shale
related: Missouri
related: Wisconsin
preferred label: لایه بنتونیت میلبریگ @fa
broader: Middle Ordovician
type: Concept

Minnesota
preferred label: مینسوتا @fa
type: Concept
related: Millbrig Bentonite Bed

Missouri
preferred label: میسوری @fa
type: Concept
related: Millbrig Bentonite Bed

Middle Ordovician
preferred label: اردویسین میانی @fa
type: Concept
narrower: Millbrig Bentonite Bed

Decorah Shale
preferred label: شیل دکورا @fa
type: Concept
related: Millbrig Bentonite Bed

Iowa
preferred label: آیوا @fa
type: Concept
related: Millbrig Bentonite Bed