1 2002 INVESTIGATIONS AT THE BOCA NEGRA WASH FOLSOM SITE, NORTH- CENTRAL NEW MEXICO Bruce B. Huckell, J. David Kilby, and Marcus J. Hamilton For the second consecutive year, the University of New Mexico Southwestern Archaeological Field School was held at the Boca Negra Wash site, a small Folsom camp situated on the Llano de Albuquerque a short distance east of the Albuquerque Volcanoes (Huckell and Kilby 2000; Huckell et al. 2001). As described previously, this site consists of two spatially discrete loci—defined by surface and shallowly buried artifact concentrations—at the southern and southeastern margins of a playa. The 15 field school students excavated 45 1 m by 1 m units in Locus A. This completed a 5 percent random sample of a 600 m2 section of the locus as well as 20 nonrandomly chosen squares to further investigate areas adjacent to particularly productive random sample units. An additional 26 units were excavated in Locus B, 7 as part of a nonrandom, patterned sampling program and 19 judgmentally placed units. One new backhoe trench was excavated in the playa, and results of paleoenvironmental and chronometric age assessments of previously collected samples of playa sediments were obtained. The most notable result of work in Locus A was the discovery of what appears to be a specialized work area near the southeastern end of the locus. From an area measuring approximately 6 m by 3 m came three tools (a complete endscraper, a multi-spurred graver, and approximately half of a large, thin unifacially retouched flake) and 159 flakes. The bulk of the flakes (86, or 54%) were recovered from three contiguous 1 m units near the center of the excavated area; all are small and appear to be derived from uniface and biface retouching. The three tools were recovered in units 1-2 m away from this debitage concentration. Locus B continued to be productive, and due in part to the drought of the past two years, surface exposure of Folsom artifacts suggested that the size of this locus is greater—at least 80 m by 20 m—than previously appreciated. Two 1 m by 2 m test units were dug in the vicinity of separate occurrences of Folsom point fragments up to 50 m west of the main area of excavations; both tests produced buried artifacts. The most important discovery, however, was the recovery of over 40 small pieces of tooth enamel, none larger than 10 mm in maximum dimension. A few represent lingual or buccal portions of cheek teeth, morphologically consistent with bison; the thicknesses of all fragments are also in the bison size range. With regard to their vertical distribution within excavated units, the enamel fragments mirror exactly the vertical distribution of the artifacts, suggesting that they are potentially associated. We hypothesize that the enamel fragments represent the last vestiges of bison that were killed and processed around the southern edge of playa by the Folsom occupants of Locus B. Similar enamel fragments have been recovered from Locus A, although in smaller numbers. Locus B, and possibly Locus A as well, may therefore represent short-term camps established after one or two successful kill events.