Their composition indicates that they were formed at a time when temperatures in the mantle were considerably higher than they are today, which shows that the Earth has continued to cool off in the intervening millennia.
Popego ya ona e supa gore e ne ya tlhamiwa ka nako ya fa dithempheretšha tsa khupetso di neng di le godimo go feta ka fa di leng gone gompieno, se se supang gore lefatshe le tsweletse go tsidifala mo ngwakgolong e e tseneletseng.