Show age of the ocean the ocean Is not of course as old as the earth since it could not be formed until the surface of the globe had cooled sufficiently to retain water on it it may therefore seem chimeri cal to try to measure the age of the sea but the task has been undertaken the estimate has been based upon the ratio of sodium the sea contains to that annually contributed by the washings from the continents the conclusion has thus been reached that the ocean has been in existence between and of years this does not seem to be a very definite determination but in geology estimates of time in years are extremely difficult because of the un certainty of the elements of calculi tion |