National preserve, northwestern Alaska, U.S., on the coast of the Chukchi Sea. Established in 1978, it was enlarged in 1980 to 1,031 sq mi (2,670 sq km). Its remarkable archaeological sites illustrate the cultural evolution of the Arctic peoples over some 4,000 years.
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Cape Krusenstern National Monument and the colocated Cape Krusenstern Archeological District is a U.S. National Monument and a National Historic Landmark centered on Cape Krusenstern in northwestern Alaska.
Founded on December 1, 1978, it is made up mainly of a coastal plain, containing large lagoons and rolling hills of limestone. The bluffs record thousands of years of change in the shorelines of the Chukchi Sea, as well as evidence of some 9,000 years of human habitation.
The archeological district comprises 114 ancient beach ridges which formed approximately 60 years apart. They provide a rare sequential look at over 5000 years of inhabitation.