and now, through a jagged aperture perhaps five feet across and three feet thick, there yawned before the avid searchers a section of shallow limestone hollowing worn more than fifty million years ago by the trickling ground waters of a bygone tropic world.
gutxi gorabehera bost oin luze eta hiru oin zabal zen zulo bihurritik esploratzaile irrikatsuen aurrean hareharriko haitzulo baten zati bat zabaltzen zen, behinolako mundu tropikal batean lurpera iragazitako uren higadurak duela berrogeita hamar milioi urte baino lehenago sortua.