Masek Beds

archaeological site, Tanzania

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Last updated

June 30, 2026

Quick Summary

The Masek Beds are a geological formation within Olduvai Gorge in northern Tanzania. These beds accumulated between 400,000 and 600,000 years ago during a period of significant geological activity, including faulting and volcanic eruptions.1

The Masek Beds consist of approximately equal parts of stream-laid sediments and wind-worked volcanic ash (tuff). Archaeologically, they contain a single known site associated with the Acheulean industry, a type of stone tool technology. While Olduvai Gorge is often called the "Cradle of Mankind," this title is also associated with a site in South Africa.1

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Olduvai Gorge
…to 800,000 years old), the Masek Beds (400,000 to 600,000 years old), the Ndutu Beds (32,000 to 400,000 years old), and the Naisiusiu Beds (15,000 to 22,000 years old).
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…to 800,000 years old), the Masek Beds (400,000 to 600,000 years old), the Ndutu Beds (32,000 to 400,000 years old), and the Naisiusiu Beds (15,000 to 22,000 years old).
Read More