The Ordovician (pronounced ) is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3+-1.7 to 443.7+-1.5 million years ago .. 
jẹ́ olórin ará Nàìjíríà.Ìtọ́kasí àwọn Ọjọ́ìbí ni àwọn olórin ará Nàìjíríà.. 