The Paleogene (alternatively Palaeogene, informally Lower Tertiary) is a geologic period and system that began 65.5 +- 0.3 and ended 23.03 +- 0.05 million years ago and comprises the first part of the Cenozoic Era.. 
jẹ́ ará Nàìjíríààìtọ́kasí àwọn Ọjọ́ìbí níàwọn ara Nàìjíríà..