With respect to the absence of strata rich in fossils beneath the Cambrian formation, I can recur only to the hypothesis given in the tenth chapter; namely, that though our continents and oceans have endured for an enormous period in nearly their present relative positions, we have no reason to assume that this has always been the case; consequently formations much older than any now known may lie buried beneath the great oceans.
Formazio kanbriarretan estratu fosiletan aberatsik ez agertzeari dagokionez, hamargarren kapituluan azalduriko hipotesira jo eta hangoa esatea beste aukerarik ez dut, hau da, gure kontinente eta ozeanoek aldi izugarriro luzean egungo kokaera erlatibo bertsuetan iraun duten arren, ez daukagula arrazoirik hau beti horrela izan dela onartzeko; beraz, egun ezagutzen den ezein formazio baino handiagoak egon daitezke ozeanoen hondoan ehortzirik.