Ka soo saar nooc ka mid ah weedhan adag Kadib markii saliid laga helay Leduc, Alberta, waxay ka mid ahayd laba geologist oo loo diray 1950 si ay ula socdaan helitaanka.
Dabcan, qaab kale oo ka sii murugsan xukunka waa "Kadib markii saliid laga helay Leduc, Alberta, waxay ka mid ahayd laba geologist oo loo diray 1950 si ay ula socdaan ogaanshaha, taas oo ay ahayd haweeneyda kaliya ee u baxday berrinka".