Ọ bụ n'oge a na-akpọ Quaternary glaciation ka e mepụtara ya mgbe oké osimiri dị ala.
N'ezie, ụdị nkebi ahịrịokwu ahụ dị mgbagwoju anya bụ "E guzobere ya n'oge ọtụtụ oge nke glaciation quaternary mgbe oke osimiri dị ala karịa - nyocha nke stalactites dị na Great Blue Hole na-egosi na nhazi ahụ mere 153,000, 66,000, 60,000, na 15,000 afọ gara aga. "