Wikimedi'Òc

Vug with aragonite crystals in arenaceous, ferruginous, fossiliferous limestone (Vinton Member, Logan Formation, Lower Mississippian; Mt. Calvary Cemetery Outcrop - Rt. 13 roadcut, Heath, east-central Ohio, USA) 3 (15630984930).jpg - Ser Amantio di Nicolao

"Liesegang banding" & iron oxide-highlighted layering in sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 1 (40563964523).jpg - Ser Amantio di Nicolao

Turgite on sandstone (Vinton Member, Logan Formation, Lower Mississippian; Hanover Pit, Licking County, Ohio, USA) 3 (46806321224).jpg - Ser Amantio di Nicolao