Brookins, D.G., Hicks, R.T. . (1989). Rb-Sr dating attempts of clay minerals from the east Chaco Canyon (DOE) drilling project, San Juan Basin, New Mexico. Isochron/West Bulletin of Isotopic Geochronology, vol. 54, p. 11-12. Edited by: Schilling, John H. Keywords: Chaco Canyon, San Juan Basin, northwestern NM McKinley, San Juan