Wikimedi'Òc

Eldredgeops milleri with two Brachispirifer, Middle Devonian, Silica Shale, units 8-11, Sylvania, Lucas County, Ohio, USA - Houston Museum of Natural Science - DSC01617.JPG - Daderot

Paraspirifer bownockeri fossil brachiopod (Silica Formation, Middle Devonian; quarry in Sylvania area, Lucas County, northwestern Ohio, USA) 1 (15360524387).jpg - Natuur12

Pyritized brachiopods (Silica Formation, Middle Devonian; quarry in Sylvania area, Lucas County, northwestern Ohio, USA) (15522841836).jpg - Natuur12

Silica Formation (Middle Devonian; Benchmark Materials-France Stone Company Sylvania Quarry, Lucas County, Ohio, USA) 1 (48372818997).jpg - Ser Amantio di Nicolao

Fossiliferous limestone (Silica Formation, Middle Devonian; Benchmark Materials-France Stone Company Sylvania Quarry, Lucas County, Ohio, USA) 1 (48372846422).jpg - Ser Amantio di Nicolao

Paraspirifer bownockeri (pyritized fossil brachiopod) (Silica Formation, Middle Devonian; quarry in Lucas County, Ohio, USA) 1.jpg - Ser Amantio di Nicolao

Paraspirifer bownockeri (pyritized fossil brachiopod) (Silica Formation, Middle Devonian; quarry in Lucas County, Ohio, USA) 2.jpg - Ser Amantio di Nicolao

Paraspirifer bownockeri (pyritized fossil brachiopod) (Silica Formation, Middle Devonian; quarry in Lucas County, Ohio, USA) 4.jpg - Ser Amantio di Nicolao

Pyritized auloporid corals encrusting a Paraspirifer bownockeri brachiopod (Silica Formation, Middle Devonian; quarry in Lucas County, Ohio, USA) 1.jpg - Ser Amantio di Nicolao