Archaeological Research Facility

The analysis here of a variety of artifacts from a number of sites or site groups in the ElSegundo project area is dominated by obsidian sources along the Jemez Lineament, and a variety of rock types likely typical of the local geology. These results are similar to previous studies of sites in the area, and support the provenance inferences from these studies (see Shackley 2015a, 2015b, 2016). None of the volcanic rocks determined to be dacite are from the three known sources in northern New Mexico (Shackley 2011a). At least two artifacts could be produced from the Black Canyon hydrothermally altered rhyolite near Socorro, New Mexico, but the variability at the source is so great, that confident inferences cannot be made at this time (Dello-Russo 2004; Table 1).