Wikimedi'Òc

Flint with weathering spherulites & rottenstone rind (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 1 (25761683508).jpg - Ser Amantio di Nicolao

Flint with weathering spherulites & rottenstone rind (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 3 (25761653788).jpg - Ser Amantio di Nicolao

Flint with weathering spherulites & rottenstone rind (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 2 (39603241872).jpg - Ser Amantio di Nicolao