Post-Laramide tectonic and volcanic transition in west-central New Mexico
Steven M. Cather

Abstract:

The transition from Laramide crustal shortening to mid-Tertiary extension occurred about 36 my in west-central New Mexico, and was accompanied by a switch from andesitic to bimodal volcanism. The post- Laramide transition occurred during Datil Group volcanism as shown by: (1) cessation of non-volcanic sedimentation, due to foundering of Laramide uplifts that later formed basins of the Rio Grande rift; and (2) displacement reversal across intrabasin fault zones in the eastern Baca basin.


Citation:

  1. Cather, Steven M., 1989, Post-Laramide tectonic and volcanic transition in west-central New Mexico, in: Southeastern Colorado Plateau, Anderson, Orin J.; Lucas, Spencer G.; Love, David W.; Cather, Steven M., New Mexico Geological Society, Guidebook, 40th Field Conference, pp. 91-97.

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