Stratigraphy and paleoenvironments of the Hagan Basin, north-central New Mexico
— Raymond V. Ingersoll

The purpose of this paper is to summarize present knowledge of the stratigraphy and paleoenvironments of the Phanerozoic section exposed in the Hagan basin, north-central New Mexico (fig. 1). Excellent exposures of Mississippian through Quaternary strata occur in this area in a homoclinal structure that tilts the section east and northeast at the northeast end of the Sandia uplift, a Neogene fault block formed concurrently with rifting. Structural and intrusive events within the Hagan basin complicate stratigraphic interpretations and correlations (Beaumont, this guidebook; Black, this guidebook; Kelley, 1977; Kelley and Northrop, 1975). Nonetheless, this is one of the most complete exposures of the Phanerozoic section in New Mexico.

 

Most of the information presented here is a condensation of Kelley and Northrop (1975, p. 28-76), with additions and modifications based on subsequent work.