The Silurian is a geologic period and system that extends from the end of the Ordovician Period, about 443.7 +- 1.5 Mya (million years ago), to the beginning of the Devonian Period, about 416.0 +- 2.8 Mya .. 
jẹ́ ará Nàìjíríààìtọ́kasí àwọn Ọjọ́ìbí níàwọn ara Nàìjíríà..