Along the Quebrada Jarana, located 13 kilometers to the North of Yopal (Figural ) rose 237 m of Stratigraphic section corresponding to the lower 40 Devil training;Figure 2 ) observing the limit with the formation overlying (41 upper Devil training; It is unhappy. The limit with the unit 40 ferruginous;San Fernando Superior training ) It is apparently transitional.