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New Mexico Geology — Back-issues

Print ISSN: 0196-948X (prior to 2015)
Online ISSN: 2837-6420

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Volume: 38, 2016

cover
Volume 38, Number 2
View as PDF   (8.32 MB)

Number: 2

Full-Issue (8.32 MB PDF)
Cover Image: Confluence of the Rio Embudo and Rio Grande
— Paul Bauer

Confluence of the Rio Embudo and Rio Grande in the Rio Grande Gorge, looking upstream (towards the east). Photo courtesy of Paul Bauer. The gorge formed due to net incision of the Rio Grande during the late Pliocene and Pleistocene. The lead article of this volume uses dated basalts to interpret the river’s history between 5.5 and 4.5 million years ago, prior to the development of the gorge. During that time period, two merging tributaries to the ancestral Rio Grande deposited a 10–25 m-thick package of gravelly sand as far as 14 km northeast of the present-day course of the river.

Contents:
  2. The youngest silicic eruptions from the Valles Caldera and volcanic hazard potential in north-central New Mexico (8.87 MB PDF), pp. 50-51.
    — G. WoldeGabriel, R. Kelley, E. Miller, and E. Schultz-Fellenz