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Valles Caldera : A Geologic History - Fraser Goff

Valles Caldera

A Geologic History

Paperback Published: 16th May 2009
ISBN: 9780826345905
Number Of Pages: 128

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The Valles Caldera consists of a twelve-mile-wide collapsed volcanic crater and more than ten postcollapse volcanic domes in New Mexico's Jemez Mountains. For over a century, it was safeguarded within the 89,000-acre Baca Ranch. In the year 2000, Congress passed the Valles Caldera Preservation Act, creating the Valles Caldera Trust to purchase the ranch and create a nine-member board of trustees responsible for the protection and development of the Valles Caldera National Preserve.
With special permission, qualified geologists interested in volcanic processes and hydrothermal systems have been allowed to conduct research on the preserve. One of those volcanologists, Fraser Goff, collaborated with the Valles Caldera Trust to provide an accessible scientific overview of the caldera's geologic wonders.
Presented in two parts, Valles Caldera first offers a summary of significant geologic events that have taken place in the Valles Caldera area. Then Goff presents the geology, volcanology, and geothermal characteristics of the Caldera and the Jemez volcanic field. Geologic terms and names unfamiliar to all but professional geologists are defined in a summarizing glossary.

Introductionp. vii
Pre-Valles Caldera Geology
Early Geologic Events and Old Rocksp. 3
The Supercontinent Pangaeap. 9
The Western Interior Seaway of North Americap. 11
The Cretaceous-Tertiary Extinctionp. 13
The Colorado Plateaup. 17
The Rio Grande Rift: Structure, Sedimentation, and Volcanismp. 19
The Jemez Lineamentp. 27
Geology of Jemez Volcanic Field and Valles Caldera
Jemez Volcanic Fieldp. 31
Formation of Toledo and Valles Calderasp. 41
Evolution of Valles Calderap. 45
The Resurgent Caldera and Ash-Flow Tuff Modelsp. 53
Eruption Volumes, Eruption Impacts, and Eruption Frequencyp. 57
The Next Valles Eruptionp. 59
Where Does the Magma Come From and Is There More?p. 61
Magnetic Polarity Eventsp. 63
Geophysical Character of Valles Calderap. 65
The Valles Geothermal Systemp. 69
Valles Lake Historyp. 77
Climate Change Research at Valles Calderap. 81
Other Geoscience in Valles after 2000p. 85
Conclusionsp. 87
Acknowledgmentsp. 89
Geologic Glossaryp. 91
Selected Bibliographyp. 99
Indexp. 109
Table of Contents provided by Ingram. All Rights Reserved.

ISBN: 9780826345905
ISBN-10: 0826345905
Audience: Professional
Format: Paperback
Language: English
Number Of Pages: 128
Published: 16th May 2009
Publisher: University of New Mexico Press
Country of Publication: US
Dimensions (cm): 21.6 x 14.0  x 0.64
Weight (kg): 0.35

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