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David Sawyer

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Research paper thumbnail of Geologic map of the Montoso Peak quadrangle, Santa Fe and Sandoval Counties, New Mexico

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Research paper thumbnail of Geologic map of the Cochiti Dam quadrangle, Sandoval County, New Mexico

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Research paper thumbnail of Geologic Map of Quadrangle 3570, Tagab-E-Munjan (505) and Asmar-Kamdesh (506) Quadrangles, Afghanistan

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Research paper thumbnail of Caldera-related lava flows and intrusions of the south-central San Juan Mountains, Colorado; analytical data

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Research paper thumbnail of Processed Landsat 7 satellite imagery of the Espanola Basin region, New Mexico

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Research paper thumbnail of Processed Landsat 7 satellite imagery of the Taos Plateau-San Luis Valley region, New Mexico and Colorado

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Research paper thumbnail of Geologic Map of Quadrangle 3568, Polekhomri (503) and Charikar (504) Quadrangles, Afghanistan

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Research paper thumbnail of Paleomagnetism and rotation constraints for the Miocene southwestern Nevada volcanic field

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Research paper thumbnail of Electromagnetic Studies and Subsurface Mapping of Electrical Resistivity in the La Bajada Constriction Area, New Mexico

Us Geological Survey Professional Paper, 2006

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Research paper thumbnail of Stratigraphy of Upper Cenozoic Fluvial Deposits of the La Bajada Constriction Area, New Mexico

Us Geological Survey Professional Paper, 2006

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Research paper thumbnail of Crustal and magmatic evolution in a large multicyclic caldera complex: isotopic evidence from the central San Juan volcanic field

Journal of Volcanology and Geothermal Research, Aug 1, 1995

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Research paper thumbnail of Hydrogeologic Framework of the La Bajada Constriction Area, New Mexico Integration of Subsurface and Surface Geology

Us Geological Survey Professional Paper, 2006

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Research paper thumbnail of Lead isotopes in continental arc magmas and origin of porphyry Cu deposits in Arizona

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Research paper thumbnail of Central San Juan caldera cluster

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Research paper thumbnail of Rethinking an archetype of rift half-graben formation; a revised model of basin geometry for the Albuquerque segment of the Rio Grande Rift, New Mexico

The Albuquerque Basin, composing the Rio Grande Rift in central New Mexico, is commonly cited as ... more The Albuquerque Basin, composing the Rio Grande Rift in central New Mexico, is commonly cited as one of the archetypes of a continental rift basin that is segmented into alternating, oppositely tilted half-grabens separated by a scissor-like transfer zone. The practice originates from a structural model of the Albuquerque Basin developed primarily from oil-industry seismic-reflection data and published in the early 1990s. Key elements of this model are an east-tilted half-graben on the north separated from a west-tilted half-graben on the south by a southwest-trending transfer zone. However, this model is conceptually inconsistent with current geologic evidence and gravity modeling for the Albuquerque Basin. Problems with the earlier model probably stem from inadequate seismic and well data on the east side of the basin. A model of basin-fill thickness constructed from gravity data supports a different picture of basin geometry, primarily for the southern half of the Albuquerque Bas...

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Research paper thumbnail of Geologic cross sections spanning the La Bajada Constriction and northern Cerrillos Uplift, New Mexico

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Research paper thumbnail of The Silent Canyon Caldera Complex--A three-dimensional model based on drill-hole stratigraphy and gravity inversion

US Geological Survey visual mark. US Geological Survey Open-File Report 99-555 Version 1.0. The S... more US Geological Survey visual mark. US Geological Survey Open-File Report 99-555 Version 1.0. The Silent Canyon Caldera Complex— A Three-Dimensional Model Based on Drill-Hole Stratigraphy and Gravity Inversion. By. ...

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Research paper thumbnail of Geophysical constraints on Rio Grande rift structure and stratigraphy from magnetotelluric models and borehole resistivity logs, northern New Mexico

Geological Society of America Special Papers, 2013

ABSTRACT

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Research paper thumbnail of Geophysical interpretations west of and within the northwestern part of the Nevada Test Site

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Research paper thumbnail of Day 4: Western San Juan Caldera Complex and Multii‐Stage Mineralization Around the Lake City Caldera

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Research paper thumbnail of Geologic map of the Montoso Peak quadrangle, Santa Fe and Sandoval Counties, New Mexico

Scientific Investigations Map

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Research paper thumbnail of Geologic map of the Cochiti Dam quadrangle, Sandoval County, New Mexico

Scientific Investigations Map

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Research paper thumbnail of Geologic Map of Quadrangle 3570, Tagab-E-Munjan (505) and Asmar-Kamdesh (506) Quadrangles, Afghanistan

Open-File Report

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Research paper thumbnail of Caldera-related lava flows and intrusions of the south-central San Juan Mountains, Colorado; analytical data

Open-File Report

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Research paper thumbnail of Processed Landsat 7 satellite imagery of the Espanola Basin region, New Mexico

Open-File Report

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Research paper thumbnail of Processed Landsat 7 satellite imagery of the Taos Plateau-San Luis Valley region, New Mexico and Colorado

Open-File Report

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Research paper thumbnail of Geologic Map of Quadrangle 3568, Polekhomri (503) and Charikar (504) Quadrangles, Afghanistan

Open-File Report

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Research paper thumbnail of Paleomagnetism and rotation constraints for the Miocene southwestern Nevada volcanic field

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Electromagnetic Studies and Subsurface Mapping of Electrical Resistivity in the La Bajada Constriction Area, New Mexico

Us Geological Survey Professional Paper, 2006

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Research paper thumbnail of Stratigraphy of Upper Cenozoic Fluvial Deposits of the La Bajada Constriction Area, New Mexico

Us Geological Survey Professional Paper, 2006

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Research paper thumbnail of Crustal and magmatic evolution in a large multicyclic caldera complex: isotopic evidence from the central San Juan volcanic field

Journal of Volcanology and Geothermal Research, Aug 1, 1995

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Research paper thumbnail of Hydrogeologic Framework of the La Bajada Constriction Area, New Mexico Integration of Subsurface and Surface Geology

Us Geological Survey Professional Paper, 2006

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Research paper thumbnail of Lead isotopes in continental arc magmas and origin of porphyry Cu deposits in Arizona

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Research paper thumbnail of Central San Juan caldera cluster

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Research paper thumbnail of Rethinking an archetype of rift half-graben formation; a revised model of basin geometry for the Albuquerque segment of the Rio Grande Rift, New Mexico

The Albuquerque Basin, composing the Rio Grande Rift in central New Mexico, is commonly cited as ... more The Albuquerque Basin, composing the Rio Grande Rift in central New Mexico, is commonly cited as one of the archetypes of a continental rift basin that is segmented into alternating, oppositely tilted half-grabens separated by a scissor-like transfer zone. The practice originates from a structural model of the Albuquerque Basin developed primarily from oil-industry seismic-reflection data and published in the early 1990s. Key elements of this model are an east-tilted half-graben on the north separated from a west-tilted half-graben on the south by a southwest-trending transfer zone. However, this model is conceptually inconsistent with current geologic evidence and gravity modeling for the Albuquerque Basin. Problems with the earlier model probably stem from inadequate seismic and well data on the east side of the basin. A model of basin-fill thickness constructed from gravity data supports a different picture of basin geometry, primarily for the southern half of the Albuquerque Bas...

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Research paper thumbnail of Geologic cross sections spanning the La Bajada Constriction and northern Cerrillos Uplift, New Mexico

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Silent Canyon Caldera Complex--A three-dimensional model based on drill-hole stratigraphy and gravity inversion

US Geological Survey visual mark. US Geological Survey Open-File Report 99-555 Version 1.0. The S... more US Geological Survey visual mark. US Geological Survey Open-File Report 99-555 Version 1.0. The Silent Canyon Caldera Complex— A Three-Dimensional Model Based on Drill-Hole Stratigraphy and Gravity Inversion. By. ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geophysical constraints on Rio Grande rift structure and stratigraphy from magnetotelluric models and borehole resistivity logs, northern New Mexico

Geological Society of America Special Papers, 2013

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geophysical interpretations west of and within the northwestern part of the Nevada Test Site

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Day 4: Western San Juan Caldera Complex and Multii‐Stage Mineralization Around the Lake City Caldera

Bookmarks Related papers MentionsView impact

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