Mars: Age of Its Craters

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Science  24 Sep 1965:
Vol. 149, Issue 3691, pp. 1496-1498
DOI: 10.1126/science.149.3691.1496


If the craters on Mars were formed by asteroidal particles having spatial distributions independent of asteroid size, and if both spatial distributions and total numbers are independent of time, the average age of the craters may be less than 300 million years.