David L. Carlson

Computer applications for the All American Pipeline Project

Most large-scale excavation projects are computerized, more-or-less, now in their methods of data recording. Here is described one which is computerized with more conviction and on a larger scale than most, with reflections on what that can and should amount to.

Pre-Clovis projectile points at the Debra L. Friedkin site, Texas—Implications for the Late Pleistocene peopling of the Americas

Stemmed projectile points are ~13,500 to ~15,500 years old and lie stratigraphically below ~13,000-year-old Clovis artifacts. Lanceolate projectile points of the Clovis complex and stemmed projectile points of the Western Stemmed Tradition first appeared in North America by ~13 thousand years (ka) ago. The origin, age, and chronological superposition of these stemmed and lanceolate traditions are unclear. At the Debra L. Friedkin site, Texas, below Folsom and Clovis horizons, we find stemmed projectile points dating from ~13.5 to ~15.5 ka ago, with a triangular lanceolate point form appearing ~14 ka ago. The sequential relationship of stemmed projectile points followed by lanceolate forms suggests that lanceolate points are derived from stemmed forms or that they originated from two separate migrations into the Americas.

Reply to “Errors in Vierra and Carlson's Presentation of Bartlett's Test of Significance”

Sanders, William T., Jeffrey R. Parsons, and Robert S. Santley 1979 The Basin of Mexico: Ecological Processes in the Evolution of a Civilization. Academic Press, New York. Turner, B. L., II 1983a Comparison of Agrotechnologies in the Basin of Mexico and Central Maya Lowlands: Formative to the Classic Maya Collapse. In Highland-Lowland Interaction in Mesoamerica: Interdisciplinary Approaches, edited by Arthur G. Miller, pp. 13-47. Dumbarton Oaks Research Library and Collection, Washington, D.C. 1983b Once Beneath the Forest: Prehistoric Terracing in the Rio Bec Region of the Maya Lowlands. Dellplain Latin American Studies, No. 13, Westview Press, Boulder. Wiseman, Frederick 1983 Subsistence and Complex Societies: The Case of the Maya. Advances in Archaeological Method and Theory 6:143-189.