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Published online by Cambridge University Press: 20 January 2017
An important distinction is here made between two types of Southwestern sites, each of which appears on the surface as a doughnut-shaped midden of burned rock with a depressed ashy center. "Midden circles" are debris thrown back from a central hearth lying on the ground surface. "Mescal pits" have central pits dug below the natural ground surface and are the remains of earth ovens.