And if, in every separate territory, hardly any idea can be formed of the length of time which has elapsed between the consecutive formations, we may infer that this could nowhere be ascertained.
Eta herrialde bereizi bakoitzean jarraikako formazioen artean igaro den denboraren ideiarik nekez egin badaiteke, hortik atera genezake beste inon ere hau zehazterik ez dagoela.