But all geologists, excepting the few who believe that our present metamorphic schists and plutonic rocks once formed the primordial nucleus of the globe, will admit that these latter rocks have been stripped of their covering to an enormous extent. For it is scarcely possible that such rocks could have been solidified and crystallised while uncovered; but if the metamorphic action occurred at profound depths of the ocean, the former protecting mantle of rock may not have been very thick.
Baina geologo guztiek, globoaren gunerik funtsezkoena gure eskisto metamorfiko eta harri plutonikoek osatu zutela sinesten duten apurrek izan ezik, onartuko dute aipaturiko harriok izugarrizko erosioa jasan dutela. Izan ere, ia ezinezkoa da harri hauek agerian egon ziren bitartean sendartu eta kristaldu izana; baina, baldin ekintza metamorfikoa itsasoaren sakonera handietan gertatu bazen, badaiteke lehengo babes-geruza oso lodia ez izana.