Figure 57. Stratigraphic columns of Ojo Alamo Sandstone at San Juan River site (Figure 1). 57.1 is expanded-scale view of lower part of Ojo Alamo column of 57.2. Figures show relative positions of large (1.3 m long) hadrosaur femur (Figure 37.1) collected from Ojo Alamo Sandstone at San Juan River locality and rock samples collected for palynologic analyses. Paleocene index palynomorphs identified by D.J. Nichols, (USGS) are shown. Modified from Fassett and Lucas (2000, figure 8).