Salt’s secret success in ancient Chaco Canyon

https://www.sciencedaily.com/releases/2016/10/161003121251.htm

Researchers had to go deep to uncover brand new knowledge that they say will "shake up" the archaeological field in the southwestern United States. Various salt compounds found deep in the soil of New Mexico’s desert may be the key to understanding how crops were cultivated in ancient Chaco Canyon — despite the backdrop of what seems an otherwise arid and desolate landscape, according to a study.

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