Figure 13. Photograph of Betonnie Tsosie Wash paleomagnetic locality, looking north ("Tsosie Wash" of Lindsay et al. 1981.) Locality is just east of north-trending tributary of Betonnie Tsosie Wash (Figure 11), about 28 km southeast of Barrel Spring locality (Figure 4). Magnetochron labels shown are corrected as discussed in section of this paper labeled "Identification of Kirtland Formation-Ojo Alamo Sandstone Magnetochrons." Numbers at arrowheads are distances in meters below base of iron-cemented cap rock of upper bench of Ojo Alamo Sandstone. Arrow heads pointing left indicate reversed polarity; arrowheads pointing right indicate normal polarity. Paleomagnetic data plot at this locality shown on Figure 12. Sample levels estimated from Figure 12, but exact original sample sites not known. Lindsay et al. (1981) placed base of upper Ojo Alamo Sandstone at base of hard, iron-cemented-sandstone cap rock at this locality, however, as figure shows, this cap rock is just a harder layer at top of upper bench of Ojo Alamo Sandstone.