Wikimedi'Òc

Marcasite concretion (Ohio Shale, Upper Devonian; Glen Echo Ravine, Columbus, Ohio, USA).jpg - Natuur12

Beekite rings on surface of silicified solitary rugose coral (Devonian; Ohio, USA) (15182130416).jpg - Ser Amantio di Nicolao

Fossil fish bones in limestone (basal Delaware Limestone, Middle Devonian; eastern bank of the Scioto River, Columbus, Ohio, USA) 1 (32992335463).jpg - Ser Amantio di Nicolao

Arthroacantha carpenteri (fossil crinoid) (Silica Shale, Middle Devonian; Sylvania, Ohio, USA) 2 (34949954364).jpg - Ser Amantio di Nicolao

Arthroacantha carpenteri (fossil crinoid) (Silica Shale, Middle Devonian; Sylvania, Ohio, USA) 3 (35620858122).jpg - Ser Amantio di Nicolao

Black chert nodule (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 2 (42189051211).jpg - Ser Amantio di Nicolao

Chert (Delaware Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) (45839063185).jpg - Ser Amantio di Nicolao

Bioturbated limestone (Silica Formation, Middle Devonian; Benchmark Materials-France Stone Company Sylvania Quarry, Lucas County, Ohio, USA) (48372839127).jpg - Ser Amantio di Nicolao