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Online guide to the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico

Figure 2. Columnar section of rocks in the Raton basin. Thickness of zones in the Raton Formation are: Lower Coal Zone, 100-300 ft; Barren Series, 180-700 ft, and Upper Coal Zone, 590-1100 ft.
Figure 2. Columnar section of rocks in the Raton basin. Thickness of zones in the Raton Formation are: Lower Coal Zone, 100-300 ft; Barren Series, 180-700 ft, and Upper Coal Zone, 590-1100 ft.

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