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A typical section of Pennsylvanian rocks in central New Mexico is 1,500-1,800 feet thick. The lowest beds lie below the zone of Fusulina and contain Chaetetes milleporaceous, Spirifer rockymontanus, Spirifer occidentalis, Cleiothyridina orbicularis, and Mesolobus mesolobus. These beds are considered to be younger than Bend, Morrow, or lower Pottsville, and are believed to be correlative with the lower Cherokee, lower Atoka, upper Dornick Hills, lower Deese, lower Millsap Lake, lower Hartville, upper Pottsville, and lower Allegheny.
The zone above this contains Fusulina euryteines, Wedekindellina euthysepta, W. excentrica, Chaetetes milleporaceous, Cleiothyrodina orbicularis, and Mesolobus mesolobus. These beds are correlated with the upper Cherokee, McCoy, upper Hermosa, middle Hartville, upper Millsap Lake, Haymond, upper Atoka, middle Deese, Boggy, Wetumka, Carbondale, and upper Allegheny. The equivalent of the Marmaton and Wewoka has not been recognized but is believed to be present.
The succeeding zone is the equivalent of the Kansas City and Lansing, upper Hartville, middle Gaptank, middle Canyon, middle Hoxbar, and lower Conemaugh. It is characterized by Triticites nebraskensis, Echinoconchus semipunctatus, and Neospirifer latus.
Next above is a zone containing numerous advanced species of Triticites, Enteletes hemiplicatus, Marginifera hystricula, and Chonetes transversalis. This zone is the equivalent of the lower Virgil, lower Cisco, upper Gaptank, and Vamoosa. Finally, the highest beds contain Triticites ventricosus and are probably the equivalent of a part of the Wabaunsee and the upper part of the Cisco (restricted).
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