mi ▁held ▁various ▁visit ing ▁positions , ▁in ▁ 1 9 9 7 ▁in ▁the ▁Department ▁of ▁African ▁Arch ae ology , ▁U pp s ala ▁University , ▁and ▁in ▁ 1 9 9 8 ▁at ▁the ▁Institute ▁of ▁Arch ae ology , ▁University ▁College ▁London ▁and ▁the ▁Depart ments ▁of ▁African ▁Arch ae ology ▁and ▁African ▁Arch ae ob ot any , ▁Johann ▁Wolfgang ▁Go ethe - Univers ität . ▁During ▁the ▁course ▁of ▁her ▁career ▁she ▁super vised ▁seven ▁ph d ▁students , ▁and ▁is ▁noted ▁for ▁being ▁an ▁inspir ational ▁teacher . ▁S ow un mi ▁has ▁worked ▁on ▁gender ▁issues ▁in ▁arch ae ology ▁in ▁Niger ia , ▁including ▁modifying ▁and ro cent ric ▁course ▁titles . ▁ ▁S ow un mi ▁was ▁the ▁founder ▁and ▁president ▁of ▁the ▁Pal yn ological ▁Association ▁of ▁Niger ia , ▁and ▁president ▁of ▁the ▁West ▁African ▁Arch ae ological ▁Association . ▁▁ ▁S ow un mi ▁retired ▁in ▁ 2 0 0 4 . ▁ ▁Research ▁ ▁S ow un mi ' s ▁research ▁achiev ements ▁include ▁the ▁first ▁ident ifications ▁of ▁the ▁age ▁and ▁pale o environment ▁of ▁the ▁G wand u ▁Form ation , ▁the ▁first ▁descri ptions ▁of ▁E oc ene ▁pol len ▁of ▁the ▁Og w ashi - As aba ▁Form ation , ▁the ▁first ▁study ▁of ▁Late ▁Qu atern ary ▁veget ation ▁and ▁environmental ▁history ▁of ▁Niger ia , ▁and ▁the ▁first ▁study ▁of ▁pol len ▁from ▁an ▁arch ae ological ▁site ▁in ▁Niger ia . ▁