This sample comes Feature 1035, a large circular-cylindrical pit at the Sweetwater locus of Los Pozos (Gregory et al. 2007:73, 81; Mabry 2005:115).
Gregory, D. A., M. N. Stevens, F. L. Nials, M. R.Schurr and M. W.Diehl 2007 Excavations in the Santa Cruz River Floodplain: Further Investigations at Los Pozos. Anthropological Papers. No. 27. Center for Desert Archaeology, Tucson.
Mabry, J. B. 2005 Diversity in early Southwestern farming and optimization models of transitions to agriculture. In Subsistence and Resource Use Strategies of Early Agricultural Communities in Southern Arizona, edited by M. W. Diehl, pp. 115-152. Anthropological Papers, No. 34. Center for Desert Archaeology, Tucson.