Excavations at Chaluka from 1938 to 1972 have been reviewed and strata of each excavation season correlated where information permits. Carbon 14 dates indicate Chaluka is 3500-4000 years old; ash fall correlations between Chaluka and Anangula support the radiometric dates. Eleven major natural and human stratigraphic events occurred at Chaluka with reef and marine economic activities present throughout. The Neo-Aleut problem is discussed with respect to the 1962 stratigraphic findings. Neo-Aleuts were in the historic period; the Paleo-Aleuts were prehistoric.