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    The earliest adobe monumental architecture in the Americas
    (National Academy of Sciences, 2021-11-30)
    Adobe bricks, or mud bricks, are construction elements which have defined major architectural traditions in the Andes over thousands of years. From Moche pyramids and the ancient city of Chan Chan in pre-Hispanic times, to Spanish casonas of the colonial period and rural houses in contemporary South America, adobe has been a central component in Andean architecture. Discovery of the remains of an early monumental building constructed primarily of adobes at Los Morteros (lower Chao Valley, north coast of Peru) places the invention of adobe architecture before 5,100 calendar years B.P. The unique composition, internal structure, and chronology of the adobes from Los Morteros show the beginnings of this architectural technique, which is associated with El Niño rainfall and the construction of the earliest adobe monumental building in the Americas. We propose that adobe architecture became a major Andean tradition after a long period of technical evolution and experimentation with both shape and composition.
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    Middle Holocene Salt Production on the North Coast of Peru
    (Cambridge University Press, 2025-09-01)
    Salt is a commodity valued for nutrition; seasoning, drying, and storing food; tanning hides; and its social and economic role in exchange systems. This study reports on salt caches and manufactured disks from Middle Holocene (∼5500–4000 cal BP) archaeological sites on the north coast of Peru. During this period, salt extraction occurred at a time of rising sea levels and wetland development in the littoral of the Chicama Valley, where maritime foragers and farmers cohabited and probably exchanged salt and marine products with inland populations for exotic food crops, minerals, and other resources. The findings here add to a growing body of archaeological evidence on the environments, techniques, and uses of salt extraction by early precontact societies.
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