Adegoke Olubummo (April 19, 1923 - October 26, 1992) je ojogbon ninu imo mathimatiki ara Naijiria.Itokasiawon ojoibi ni 1923Awon ojoalaisi ni 1992Awon ara Naijiria.. 
The permian period follows the Carboniferous and extends from 299.0 +- 0.8 to 251.0 +- 0.4 Mya (million years before the present).. 