--> Figure 2

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Figure 2. Sketch cross-section, showing the unconformable relations between the Vermejo Formation and the overlying Tertiary Poison Canyon Formation (from Lee and Knowlton, 1917). The Raton formation is absent. The Pierre Shale is present at the anticlinal axis of the Oakdale anticline. while the Poison Canyon is present in the axis of the Ojo syncline.