Diagenesis of the Mississippian Arroyo Penasco Group, north-central New Mexico
Dana S. Ulmer and Robert L. Laury
The Arroyo Periasco Group of the southern Sangre de Cristo Mountains comprises the oldest Paleozoic sediments found in north-centra New Mexico. The purpose of this paper is to discuss the nature anc significance of the varied and spectacular diagenetic fabrics preserved within this thin Mississippian section. Eight outcrops between Taos Las Vegas, and Santa Fe (Fig. I) were measured, described, and sampled. Samples from five of the outcrops, Cuchilla del Ojo, Ponce de Leon, Rio Grande del Rancho, Trout Springs, and Tererro, were studies in detail utilizing standard petrographic techniques and cathodolumi nescence. The carbonate members of the Arroyo Periasco Group have undergone dolomitization, dedolomitization, silicification, calcitizatior of evaporites, and brecciation. The complex diagenetic history of the Arroyo Periasco Group carbonates resulted from periodic episodes 01 exposure prior to Pennsylvanian sedimentation.
- Ulmer, Dana S.; Laury, Robert L., 1984, Diagenesis of the Mississippian Arroyo Penasco Group, north-central New Mexico, in: Rio Grande rift--Northern New Mexico, Baldridge, W. S.; Dickerson, P. W.; Riecker, R. E.; Zidek, J., New Mexico Geological Society, Guidebook, 35th Field Conference, pp. 91-100.