Wikimedi'Òc

Orthonybyoceras duseri, Late Ordovician, Waynesville Formation, Warren County, Ohio, USA - Houston Museum of Natural Science - DSC01658.JPG - Daderot

Xenocrinus baeri fossil crinoids in fossiliferous limestone (Whitewater Formation, Upper Ordovician; northeastern Warren County, southwestern Ohio, USA) 1 (15115268657).jpg - Natuur12

Xenocrinus baeri fossil crinoids in fossiliferous limestone (Whitewater Formation, Upper Ordovician; northeastern Warren County, southwestern Ohio, USA) 3 (15278777236).jpg - Natuur12

Xenocrinus baeri fossil crinoids in fossiliferous limestone (Whitewater Formation, Upper Ordovician; northeastern Warren County, southwestern Ohio, USA) 4 (15278775616).jpg - Natuur12

Xenocrinus baeri fossil crinoids in fossiliferous limestone (Whitewater Formation, Upper Ordovician; northeastern Warren County, southwestern Ohio, USA) 2 (15115228788).jpg - Natuur12

Fluvial deposits (Holocene; Roaring Run, Warren County, Ohio, USA) 2 (31635170108).jpg - Lu Brito

Gutter cast (Waynesville Formation or Liberty Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 1 (44772970594).jpg - Lu Brito

Gutter cast (Waynesville Formation or Liberty Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA) 2 (44772970854).jpg - Lu Brito

Fossil bivalve in limestone (Arnheim Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 1 (30545913137).jpg - Lu Brito

Uppermost Arnheim Formation (Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 7 (45434270192).jpg - Lu Brito

Uppermost Arnheim Formation (Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 1 (45434076782).jpg - Lu Brito

Basal Waynesville Formation (Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 1 (45483408881).jpg - Lu Brito

Surface geology map, Caesar Creek Watershed, Miami Valley Resource Conservation and Development Area - Clinton, Greene, and Warren counties, Ohio LOC 00556734.jpg - Fæ

Ctenodonta sp. (fossil bivalve) (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA).jpg - Ser Amantio di Nicolao

Nautiloid in fossiliferous limestone (Waynesville Formation or Liberty Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA).jpg - Ser Amantio di Nicolao