The paleoflora of the lower Cutler Formation (Pennsylvanian, Desmoinesian?) in El Cobre Canyon, New Mexico, and it's biochronological significance
— Adrian P. Hunt and Spencer G. Lucas

Two new megafossil plant localities have been discovered in megasequence one of the Cutler Formation in El Cobre Canyon. Megasequence one also contains putative Late Pennsylvanian vertebrates. Plant taxa present at NMMNH localities 2575 and 2576 in megasequence one are Neuropteris scheuchzeri, Alethopteris serlii, A. ambigua, Sigillaria rugosa, Cyperites bicarinatus, Cyathocarpus cf. P. arborescens and indeterminate seeds. These taxa suggest an age possibly as old as Middle Pennsylvanian (Desmoinesian) for megasequence one and its tetrapod fauna.