Figure 24. Large-scale views of upper part of paleomagnetic section at Mesa Portales (from upper part of paleomagnetic section of Figure 23). 24.1 Blow-up of entire Ojo Alamo Sandstone part of section; 24.2 Expanded view of paleomagnetic collection sites in upper part of magnetochrons C29r and C29n. Numbers of sample levels are in meters below base of upper massive sandstone bed of Ojo Alamo Sandstone.