Stratigraphic summary and structural problems of Precambrian rocks, Picuris Range, New Mexico
Paul W. Bauer
The Picuris Range, located in north-central New Mexico 20 km southwest of Taos (Fig. 1), is a Precambrian-cored projection pointing westward from the southern Sangre de Cristo Mountains. All of the Precambrian rocks in the range are of Proterozoic age. They are bounded on the east by Cenozoic and Paleozoic rocks, and on the other three sides by sediments of the Rio Grande rift and volcanic rocks of Tertiary age.
Mineral assemblages in the Proterozoic rocks indicate medium-grade (amphibolite facies) peak metamorphic conditions near 530°C, 3.7 kb (Holdaway, 1978), at or near the AI,SiO, triple point.
Several major stratigraphic and structural problems remain to be solved in the highly deformed Proterozoic rocks of the Picuris Range. This report discusses several of these problems.
- Bauer, Paul W., 1984, Stratigraphic summary and structural problems of Precambrian rocks, Picuris Range, 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. 199-204.