CLAUDIA J. LEWIS

Los Alamos National Laboratory
EES-1, MS D462 Los Alamos, NM 875445
Telephone: (505)665-7728
FAX: (505)665-3285
email: clewis@lanl.gov

Education

Ph. D., Geology 1994 HARVARD UNIVERSITY Thesis title: Constraints on extension in the Gulf of California Extensional Province from the Sierra San Fermín, northeastern Baja California, Mexico.

M.S., Geology 1989 CALIFORNIA STATE UNIVERSITY, LOS ANGELES Thesis title: Crustal extension and shoulder uplift in the Rio Grande rift, New Mexico.

A.B., American Civilization 1979 BROWN UNIVERSITY

Current Research Interests

· Deformation mechanisms in porous geologic materials, and influence of faults on fluid flow
· Geometry, kinematics and mechanics of continental extension and relationship to plate motions
· Links between surficial and deep lithospheric processes, especially as expressed in topography
· Spatial and temporal distribution of extension and volcanism, and controls on tectonism and magmatism

Research Experience

TECHNICAL STAFF MEMBER July 1999-present Los Alamos National Laboratory Principal research projects: structural geology, neotectonics and seismic hazards associated with continental extension; deformation mechanisms and fluid flow in high-porosity geomaterials. Continuing research in Spain on lithospheric thinning and landscape evolution of south-central Pyrenees. Serving on LANL Women's Diversity Working Group (2000-2002) and Fellows Selection Committee (2000).

POSTDOCTORAL FELLOW Aug. 1998-July 1999 Los Alamos National Laboratory Researched lithospheric thinning beneath northeastern Spain, erosional denudation and isostatic rebound of the Spanish Pyrenees, and middle Miocene-Pliocene geologic tie-points across Gulf of California Extensional Province, Mexico. Participated in several LANL programs, including 3D modeling of geology and groundwater flow in the Española Basin.

DIRECTOR'S-FUNDED POSTDOCTORAL FELLOW Aug. 1996-Aug. 1998 Los Alamos National Laboratory Researched active crustal extension, volcanism, and hypothesized lithospheric thinning beneath northeastern Spain related to plate tectonic movements and/or plume activity. Extensive use of Nd-Sr isotopic analysis, 40Ar/39Ar geochronology, topographic analysis, and structural analysis.

FULBRIGHT FELLOW Dec. 1994-March 1996 University of Barcelona, Spain Investigated relationships between post-orogenic isostatic rebound, active normal faulting, and topographic development of northeastern Spain using geomorphic mapping, synthesis of geological and geophysical data sets, and flexural modeling. Research Grants, Fellowships, and Scholarships National Science Foundation Grant, 2000-2002, $250,000. Collaboration with Eric McDonald (Desert Research Institute). Fulbright Professional Research Grant, University of Zaragoza, Spain, 2001-2002. Institute of Geophysics and Planetary Physics (University of California Collaborative Research Program), 2001 (3-yr grant pending renewal), $17,000 YR1. Collaboration with Laurel Goodwin (NM Tech) & George Guthrie (LANL). Institute of Geophysics and Planetary Physics, 1997-2000, $81,000. Collaboration with W. Scott Baldridge (LANL) & Yemane Asmerom (UNM). National Geographic Society, 1998-1999, $20,000. Collaboration with Eric McDonald (DRI).

Publications

Papers in Preparation or Submitted

LEWIS, C. J., Asmerom, Y., and Baldridge, W. S., Plumes and slabs beneath Iberia?: Influences on Cenozoic lithospheric thinning and alkaline volcanism: in preparation for Journal of Geophysical Research.

Papers Published

LEWIS, C. J., Vergés, J., and Marzo, M., 2000, High mountains in a zone of extended crust: Insights into the geodynamic evolution of northeastern Iberia: Tectonics, v.19, p. 86-102.

Gardner, J. N., Lavine, A., WoldeGabriel, G., Krier, D., Vaniman, D., Caporuscio, F., LEWIS, C., Reneau, P., Kluk, P., and Snow, M. J., 1999, Structural geology of the northwestern portion of Los Alamos National Laboratory, Rio Grande rift, New Mexico: Implications for seismic surface rupture potential from TA-3 to TA-55: Los Alamos National Laboratory Miscellaneous Series report no. LA-13589-MS, 112 pp.

Stock, J. M., LEWIS, C. J., and Nagy, E. A., 1999, The tuff of San Felipe: an extensive middle Miocene pyroclastic flow deposit in NE Baja California, Mexico: Journal of Volcanology and Geothermal Research, v. 93, 53-74.

LEWIS, C. J., Wernicke, B. P., Selverstone, J., and Bartley, J. M., 1999, Deep burial depths for metapelites from the footwall of the northern Snake Range décollement, Nevada: Geological Society of American Bulletin, v. 111, p. 39-51.

LEWIS, C. J., and Stock, J. M., 1998. Neogene extension and distributed dextral shear in the Sierra San Fermín, northeastern Baja California, Mexico: Late Miocene to Recent transtensional tectonics: Journal of Structural Geology, v. 20, pp. 1043-1063.

LEWIS, C. J., and Stock, J. M., 1998, Paleomagnetic evidence of localized vertical-axis rotation during Neogene extension of the Sierra San Fermín, northeastern Baja California, Mexico, Journal of Geophysical Research, v. 103, p. 2455-2470.

Vergés, J., LEWIS, C. J., and Marzo, M., 1996, Drenaje fluvial y topografía ligados a extensión: NE de Iberia, Geogaceta, v. 20, no. 4, p. 850-852.

LEWIS, Claudia J., 1996, Stratigraphy and geochronology of Miocene and Pliocene volcanic rocks in the Sierra San Fermín and southern Sierra San Felipe, Baja California, Mexico, Geofísica Internacional, v. 35, no. 1, p. 3-25.

LEWIS, Claudia J., and Baldridge, W. Scott, 1994, Crustal extension in the Rio Grande rift, New Mexico: Half-grabens, accommodation zones, and shoulder uplifts in the Ladron Peak-Sierra Lucero area, in Keller, G. R., Cather, S. M., and Hawley, J. W., (eds.), Basins of the Rio Grande Rift: Structure, Stratigraphy, and Tectonic Setting: Geol. Soc. Amer. Special Paper 291, p. 135-156. Recent

Abstracts

LEWIS, Claudia J., Gardner, Jamie N., Krier, Donathon, and Lavine, Alexis, 2000, Foliated clays provide evidence of young faulting associated with the Pajarito fault zone, Los Alamos, New Mexico: Geol. Soc. Amer. Abstracts with Programs, v. 32, no. 7, p. A-119.

Sancho, C., LEWIS, C. J., McDonald, E. V., and Peña, J. L., 2000, Primeros datos sobre la relación entre el levantamiento postorogénico de los Pirnieos y el patrón de encajamiento fluvial del Río Cinca durante el Cuaternario (Depresión del Ebro): Proceedings of the VI Reunión Nacional de Geomorfología (Madrid, September 18-19, 2000).

LEWIS, C. J., McDonald, E., Sancho Márcen, C., and Peña-Monné, J. L., 2000, Using Quaternary dating methods, stratigraphy and patterns of stream incision to constrain models of post-orogenic rock uplift: Preliminary results from the Ebro basin, Spain: Geol. Soc. Amer. Abstracts with Programs, 31(7), p. A422.

Oskin, M., Stock, J., and LEWIS, C., and Martín-Barajas, A., 1999, Separation of Baja California from North America: New constraints on timing and total displacement: Geol. Soc. Amer. Abstracts with Programs, 31(7), p. A294.