The Ordovician, named after the Celtic tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in northern Wales into the Cambrian and Silurian periods respectively.. 
Orílẹ̀-èdè Nàìjíríà ni wọ́n bí Kevin sí tí wọ́n sì tọ́ dàgbà ní ìlú England ni Newcastle upon Tyne.. 