Geology and Petrogenesis of Ash-Flow Tuffs and Rhyolitic Lavas Associated with the Gila Cliff Dwellings Basin-Bursum Calder Complex, Southwestern New Mexico

Author

Sheila June Seaman

Publication Date

Spring 5-5-1988

Abstract

The Mogollon-Datil volcanic field of southwestern New Mexico was the site of extensive mid-Tertiary felsic volcanism. The Bursum caldera-Gila Cliff Dwellings basin is a volcanic complex in which stratigraphic and compositional relationships between eruptive units are controversial. Uncertainties associated with the complex include the relative ages of the two overlapping structures, the caldera of origin of ash-flow tuff which fills the Gila Cliff Dwellings basin, and the reconciliation of stratigraphic and chemical relations between volcanic units. A stratigraphic, structural, paleomagnetic, and petrologic study of six ash-flow tuff and lava units has contributed data to several problems concerning the geologic history of the Bursum-Gila Cliff Dwellings complex.

Degree Name

Earth and Planetary Sciences

Level of Degree

Doctoral

Department Name

Department of Earth and Planetary Sciences

First Committee Member (Chair)

Wolfgang Eugene Elston

Second Committee Member

John Geissman

Third Committee Member

Klaus Keil

Fourth Committee Member

Albert Masakiyo Kudo

Project Sponsors

National Science Foundation, Sigma Xi, Department of Geology of the University of New Mexico

Language

English

Keywords

Gila Cliff Dwellings, Basin-Bursom Caldera Complex, Rhyolitic Lava, Ash-Flow Tuff

Document Type

Dissertation

Recommended Citation

Seaman, Sheila June. "Geology and Petrogenesis of Ash-Flow Tuffs and Rhyolitic Lavas Associated with the Gila Cliff Dwellings Basin-Bursum Calder Complex, Southwestern New Mexico." (1988). https://digitalrepository.unm.edu/eps_etds/125