Wikimedi'Òc

MeadvilleConcretion091912.jpg - Wilson44691

Quartz-pebble conglomerate ("Sharon" Conglomerate, Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 29 (37284455770).jpg - Ser Amantio di Nicolao

Barite on fluorite (Cave-in-Rock, Illinois, USA) (41030479682).jpg - Ser Amantio di Nicolao

Witherite (Hardin County, Illinois, USA) (39340194940).jpg - Ser Amantio di Nicolao