Oregon State University

PhD Student

PhD, Geology, College of Earth, Ocean and Atmospheric Science
Oregon State University (OSU), Corvallis, OR, 2012

Thesis title: Rhyolitic magmatism of the High Lava Plains and adjacent northwest Basin and Range, Oregon: Implications for the evolution of continental crust

Advisor: Dr. Robert A. Duncan

Cogito Geologic

C.E.O.

Available for consulting work, primarily in geochemistry, characterization (rocks and engineered materials), petrogenetic modeling, mining and mineral resources, and environmental situations.

Texas A&M University-Kingsville

Assistant Professor

Assistant Professor of Geology supporting undergraduate research and the following courses and laboratories: Earth Science; Introduction to Oceanography, Astronomy and the Atmosphere; Physical Geology; Mineralogy; Petrology; Geochemistry; Field Course I and Field Course II. Co-director and organizer of Texas A&M University – Kingsville Field Camp (2014 – 2019).

Bimodal Volcanism of the High Lava Plains and Northwestern Basin and Range of Oregon: The Distribution and Tectonic Implications of Age-Progressive Rhyolites

Geochemistry Geophysics Geosystems

Multiple episodes of Oligocene and younger silicic volcanism are represented in the high lava plateau of central and southeastern Oregon. From 12 Ma to Recent, volcanism is strongly bimodal with nearly equal volumes of basalt and rhyolite. We attribute the rhyolitic age progression to mantle upwelling in response to slab rollback and steepening, and this is consistent with mantle anisotropy under the region and analog slab rollback models.

Bimodal Volcanism of the High Lava Plains and Northwestern Basin and Range of Oregon: The Distribution and Tectonic Implications of Age-Progressive Rhyolites

Geochemistry Geophysics Geosystems

Multiple episodes of Oligocene and younger silicic volcanism are represented in the high lava plateau of central and southeastern Oregon. From 12 Ma to Recent, volcanism is strongly bimodal with nearly equal volumes of basalt and rhyolite. We attribute the rhyolitic age progression to mantle upwelling in response to slab rollback and steepening, and this is consistent with mantle anisotropy under the region and analog slab rollback models.

Studies of superlattice structure of opals as compared to other rocks by use of positron annihilation, X-ray powder diffraction and scanning electron microscopy methods

Journal of the Idaho Academy of Science

Positron lifetime and Doppler broadening spectroscopy on opals show a presence of positronium formation. The positron annihilation signal observed in the opals is affected by the phase of diagenesis (maturity) and the degree of dehydration of opals.

Bimodal Volcanism of the High Lava Plains and Northwestern Basin and Range of Oregon: The Distribution and Tectonic Implications of Age-Progressive Rhyolites

Geochemistry Geophysics Geosystems

Multiple episodes of Oligocene and younger silicic volcanism are represented in the high lava plateau of central and southeastern Oregon. From 12 Ma to Recent, volcanism is strongly bimodal with nearly equal volumes of basalt and rhyolite. We attribute the rhyolitic age progression to mantle upwelling in response to slab rollback and steepening, and this is consistent with mantle anisotropy under the region and analog slab rollback models.

Studies of superlattice structure of opals as compared to other rocks by use of positron annihilation, X-ray powder diffraction and scanning electron microscopy methods

Journal of the Idaho Academy of Science

Positron lifetime and Doppler broadening spectroscopy on opals show a presence of positronium formation. The positron annihilation signal observed in the opals is affected by the phase of diagenesis (maturity) and the degree of dehydration of opals.

Geological and geophysical perspectives on the magmatic and tectonic development, High Lava Plains and northwest Basin and Range

Geological Society of America Field Guide 15

A large part of the northwestern United States has undergone extensive late Cenozoic magmatic activity yielding one of the great continental volcanic provinces on Earth. Within this broader area lies the High Lava Plains province, the focus of this field guide.

Bimodal Volcanism of the High Lava Plains and Northwestern Basin and Range of Oregon: The Distribution and Tectonic Implications of Age-Progressive Rhyolites

Geochemistry Geophysics Geosystems

Multiple episodes of Oligocene and younger silicic volcanism are represented in the high lava plateau of central and southeastern Oregon. From 12 Ma to Recent, volcanism is strongly bimodal with nearly equal volumes of basalt and rhyolite. We attribute the rhyolitic age progression to mantle upwelling in response to slab rollback and steepening, and this is consistent with mantle anisotropy under the region and analog slab rollback models.

Studies of superlattice structure of opals as compared to other rocks by use of positron annihilation, X-ray powder diffraction and scanning electron microscopy methods

Journal of the Idaho Academy of Science

Positron lifetime and Doppler broadening spectroscopy on opals show a presence of positronium formation. The positron annihilation signal observed in the opals is affected by the phase of diagenesis (maturity) and the degree of dehydration of opals.

Geological and geophysical perspectives on the magmatic and tectonic development, High Lava Plains and northwest Basin and Range

Geological Society of America Field Guide 15

A large part of the northwestern United States has undergone extensive late Cenozoic magmatic activity yielding one of the great continental volcanic provinces on Earth. Within this broader area lies the High Lava Plains province, the focus of this field guide.

From shifting silt to solid stone: The manufacture of synthetic basalt in ancient Mesopotamia

Science

Slabs and fragments of gray-black vesicular “rock,” superficially resembling natural basalt but distinctive in chemistry and mineralogy, were excavated at the second-millennium B.C. Mesopotamian city of Mashkan-shapir, about 80 kilometers south of Baghdad, Iraq. Most of this material appears to have been deliberately manufactured by the melting and slow cooling of local alluvial silts. The high temperatures (about 1200°C) required and the large volume of material processed indicate an industry in which lithic materials were manufactured (“synthetic basalt”) for grinding grain and construction.

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter

Phi Kappa Phi (Honor Society)

Charter member of the Kingsville, TX chapter