Figure 19. Stratigraphic cross section through five paleomagnetic sections in southwestern San Juan Basin (modified from Figure 17) using base of magnetochron C29n instead of base of Ojo Alamo Sandstone as a datum. Column localities shown on Figure 3 and Figure 4. Column headings and figure references described on figure 17. Section HW from Fassett and Steiner (1997), four other sections from Lindsay et al. (1981); labels of magnetochrons are as shown by those authors. Alignment of column BTW based on field measurements of distance from lowermost C29n data point to base of Ojo Alamo Sandstone at BTW locality. (Some magnetochron labels shown are now known to be incorrect as discussed in section of this paper labeled "Identification of Kirtland Formation-Ojo Alamo Sandstone Magnetochrons.")