Figure 8. Paleomagnetic data plot at "Hunter Wash/Alamo Wash" locality. (Figure is modification of figure 6 of Lindsay et al. 1981 and is reproduced herein with permission of the American Journal of Science.) Upper part of section through upper Kirtland Formation and lower Ojo Alamo Sandstone is labeled SM on Figure 3 and Figure 4. Cretaceous-Tertiary boundary plus magnetochron labels as identified by Lindsay et al. (1981) are added for ease of discussion. Bone symbols represent important vertebrate-fossil levels. (Note: some magnetochron labels shown are now known to be incorrect as discussed in the section of this paper labeled "Identification of Kirtland Formation-Ojo Alamo Sandstone Magnetochrons.")