Pasi raive rakatonhora munguva yeCambrian yekutanga, zvichida nekuda kwekondinendi yekare yeGondwana yakafukidza South Pole uye ichivhara mafashama egungwa. Zvisinei, tembiricha yepakati yaive 7 degrees Celsius yakakwira kupfuura nhasi. Panogona kunge paine polar ice caps uye nhevedzano ye glaciations, sezvo nyika yakanga ichiri kupora kubva kune yekutanga Snowball Earth. Yakave inodziya kusvika kumagumo enguva; ma glaciers akadzokera shure uye pakupedzisira akanyangarika, uye mwero wegungwa wakakwira zvakanyanya. Maitiro aya aizoenderera mberi muOrdovician nguva. Mubvunzo: Ndeipi nguva yakaona mwero wegungwa uchiramba uchikwira?
Ordovician