Figure 34. Time-stratigraphic cross section along southwest margin of the San Juan Basin (line of section on
Figure 3). Cross section modified from
Figure 33 to show presence of hiatus in Fruitland-Kirtland section between Mesa Portales area and Ojo Alamo type area; pre-Ojo Alamo Sandstone hiatus also shown. (See
Figure 33 for drill-hole identifications and palynologic-sample data.) About 215 m of section missing from the Fruitland-Kirtland section in Mesa Portales area represents about 1.3 m.y. Pre-Ojo Alamo Sandstone hiatus represents nearly 8 m.y. in Ojo Alamo Sandstone type area. Vertical exaggeration = 130 x.