 Kuita kwekupisa hakugari kwakafaa semapako makuru aripaNyika ayo anogara anekudziya kwakafaa, asi zvinowirirana nemaburi aripasi akadzika, akadaro Glen Cushing wechikwata cheGeological Survey Astrogeology chekuUnited States uye yunivhesiti yeNorther Arizona irimuFlagstaff, Arizona. 