EARTH SCIENCES-UCR

EARTH SCIENCES FACULTY

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SHAWN BIEHLER, Professor
Ph.D., California Institute of Technology, 1964

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Research Interests

Seismic refraction; magnetic and gravity investigations; geothermal exploration; ground-water studies; rift tectonics.

Recent Projects

Applied geophysical studies of the Espanola Basin, Rio Grande Rift, New Mexico; ground-water studies in the Twentynine Palms area; gravity and magnetic modeling of the Pierce, South Dakota region; seismic refraction reduction and interpretation using a PC; gravity maps of southern California.

Selected Publications

A geophysical model of the Española Basin, Rio Grande rift, New Mexico. Biehler, S., et al, Geophysics, vol. 56, No. 3, pp. 340-353, 1991.

Inversion modeling of gravity with prismatic mass bodies. Lee, T-C, and S. Biehler, Geophysics, Vol. 56, No. 9, pp. 1365-1376, 1991.

Principal facts for gravity data compiled for the Santa Ana 1° by 2° quadrangle, California. Biehler, S., et al., U.S. Geological Survey Open-FIle Report 92-236-A, 62 pp., 1992.







YUE-HONG CHOU, Associate Professor
Ph.D., The Ohio State University, 1983.
hong@ucrac1.ucr.edu

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Research Interests
Quantitative analysis of geographic data, computer assisted cartography, geographic information systems, transportation geography and urban transportation planning, location-allocation analysis.

Recent Projects
GIS in wildland fire management, map pattern and spatial statistics, surface analysis, airline transportation.

Selected Publications

Mapping probability of fire occurrence in San Jacinto Mountains, California, USA. Chou, Y.H., Environmental Management, 17(1):129-140, 1993.

Nodal accessibility of air transportation in the United States, 1985-1989. Chou, Y.H., Transportation Planning and Technology, 17:25-37, 1993.

Airline degregulation and nodal accessibility. Chou, Y.H., Journal of Transport Geography, Vol. 1, No. 1, pp. 36-46, 1993.

A method for measuring the spatial concentration of airline travel demand, Chou, Y.H., Transportation Research 27(4): 267-273, 1993.







MARY L. DROSER, Associate Professor
Ph.D., University of Southern California, 1987
droser@ucrac1.ucr.edu

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Research Interests
Evolutionary paleoecology, ichnology, rugose and scleractinian corals, Phanerozoic trends in ecospace utilization, Cambrian and Ordovician of the Great Basin.

Recent Projects
Paleoenvironmental history of deep-water scleractinian corals; Phanerozoic history of bioturbation in nearshore settings; development of infaunal habitats during the Cambrian and Ordovician; paleoecology of the Ordovician radiation.

Selected Publications

Ordovician increase in extent and depth of bioturbation: implications for understanding early Paleozoic ecospace utilization. Droser, M.L. and Bottjer, D.J., Geology, 17:850-852, 1989.

Ichnofabric of the Paleozoic Skolithos ichnofacies and the nature and distribution of the Skolithos Piperrock. Droser, M.L., PALAIOS, 6:316-325, 1991.

Trace fossils and bioturbation: the other fossil record. Crimes, P. and Droser, M.L., Annual Review Ecology and Systematics, vol. 20, 1992.

Environmental patterns in the origin and diversification of rugose and deep-water scleractinian corals, Courier Forschungs - Institut Senckenberg, Droser, M.L. Hampt, G., and Clements, S.J., v. 164, pp. 47-54, 1993.

Trends and patterns in Phanerozoic Ichnofabric, Annual Review of Earth and Planetary Sciences, Droser, M.L. and Bottjer, D.J., v. 21, pp. 205-225, 1993.







WILFRED A. ELDERS, Professor Emeritus
Ph.D., University of Durham, England, 1961
elders@ucrac1.ucr.edu

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Research Interests
Geothermal resource investigations, water/rock reactions in hydrothermal systems, research drilling; tectonics of the Salton Trough; igneous and metamorphic petrology; radon in magma-hydrothermal systems, the magma-hydrothermal interface.

Recent Projects
Chief Scientist of the Salton Sea Scientific Drilling Project; study of active geothermal systems as natural analogs of possible activity in high-level nuclear waste repositories; and use of radon to study circulation in the Beppu hydrothermal system, Kyushu, Japan. Acid alterations in fumarolic environments. The White Island magma- hydrothermal system, New Zealand.

Selected Publications

A detailed gravity survey to evaluate the geothermal resource potential near Mexicali Airport, Baja California, Mexico. J.A. Reyes-López, J. Ramírez-Hernandez, M.E. Vega-Aguilar, W.A. Elders, and H. Campbell-Ramíez, Transactions Geothermal Resources Council, vol. 17, pp. 120-125, 1993.

The probable heat sources of the high-temperature geothermal systems of Alta and Baja California. Elders, W.A., Proceedings of Workshop on Deep-Seated and Magma-Ambient Geothermal Systems, New Energy and Industrial Technology Development Organization, Tsukuba, Japan, March 1994, pp. 111-120, 1994.

The challenge of drilling active magma-hydrothermal systems: the case for White Island, New Zealand. Elders, W.A., Transactions VIIth International Symposium on the Observation of the Continental Crust through Drilling, Santa Fe, New Mexico, April 1994, pp. 93-99, 1994.

Fumarolic emanations due to acid alteration in the Beppu Geothermal System, Kyushu, Japan. Elders, W. A., Proceedings of the 16th New Zealand Geothermal Workshop, Auckland, New Zealand, November 1994, pp. 85-90.

Planning the Continental Scientific Drilling Program. Elders, W.A., EOS, Transactions of the American Geophysical Union, 75, No. 40, pp. 530-531..

Drilling the Magma-Hydrothermal Interface: WISDP, The White Island Scientific Drilling Project, New Zealand. IUGG Meeting, IAUCEI Symposium on the Magma-Hydrothermal Interface, Boulder, CO, July 1995. W. A. Elders.







HARRY W. GREEN, II, Professor
and Director of the Institute of Geophysics and Planetary Physics
Ph.D., Univ. of California, Los Angeles, 1968
hgreen@ucrac1.ucr.edu

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Research Interests
Experimental deformation of rocks and minerals at high temperature and pressure; rheology of the mantle; mechanisms of phase transformations; mestastable phase equilibria; mechanism of deep-focus earthquakes; effect of trace impurities on the rheology of minerals; nonhydrostatic thermodynamics; ultrahigh pressure metamorphism.

Recent Projects
(1) Laboratory: The pressure dependence of creep; the effect of stress on the mechanism of the olivine spinel and other phase transformations; the mechanism of deep-focus earthquakes; the solubility of OH in ß-olivine; rheology of deep mantle phases and their analogues; (2) Field: Microstructures of olivine in mantle xenoliths and inference of stresses in the upper mantle; analysis of a garnet peridotite subjected to ultrahigh pressure metamorphism (3) Theoretical: Causes and mechanisms of pressure solution; disequilibrium thermodynamics; the effect of stress on polymorphic phase transformations; why do faults form at 30° to compression?

Selected Publications

Anticrack-associated faulting at very high pressure in natural olivine. Green, H.W., II, T.E. Young, D. Walker and C.H. Scholz, Nature 348:720-722, 1990.

Infrared spectroscopic investigation of hydroxl in ß-(Mg,Fe)2SiO4 and coexisting olivine: Implications for mantle evolution and dynamics. Young, T.E., H.W. Green, II, A. Hofmeister and D. Walker, Phys. Chem. Mins., 19:409-422, 1992.

Solving the paradox of deep earthquakes. Green, H.W., II, Scientific American, 271:64-71 (September, 1994).

Melt topology in partially molten mantle peridotite during ductile deformation. Jin, Z-M and H.W. Green, II, Nature, 372:164-167, 1994.

The mechanics of deep earthquakes. Green, H.W., II, and H. Houston. Ann. Rev. Earth and Planet. Sci., 23:169:213, 1995.







ANDREW E. G. JONAS, Assistant Professor
Ph.D., The Ohio State University, 1989
jonas@ucrac1.ucrac1.ucr.edu

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Research Interests
Urban development, political geography, land use conflicts, environmental policy.

Recent Projects
Labor control and community in the politics of deindustrialization: urban growth issues in Southern California; jurisdictional issues relating to the Endangered Species Act.

Selected Publications

Corporate takeover and community politics: the case of Norton Company in Worcester. Jonas, A.E.G., Economic Geography, October, 348-372, 1992.

Urban development, collective consumption, and the politics of metropolitan fragmentation. Jonas, A.E.G., Political Geography Quarterly, 12:1, 8-37, (with K. Cox), 1993.

Urban theory: reworking the division of labor. Jonas, A.E.G., Urban Geography, 14(4), 397-407, 1993.

The scale spatiality of politics. Jonas, A.E.G., Society and Space, 12(3), 257-264, 1994.

United States urban policy: A question of scale? Jonas, A.E.G., Urban Geography, 15(4), pp. 395-405, 1994.

Labor and community in the deindustrialization of urban America. Jonas, A.E.G., Journal of Urban Affairs, 17(2), 183- 199.







MARILYN A. KOOSER, Lecturer and Museum Scientist
Ph.D., Univ. of California, Riverside, 1980
kooser@ucrac1.ucrac1.ucr.edu

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Research Interests
Late Cretaceous-Paleocene biostratigraphy, Paleocene stratigraphy in the Transverse Ranges, sedimentary facies in deep-sea fans.

Recent Projects
Facies mapping and modeling of depositional systems in the San Francisquito Formation, southern California; echinoid biostratigraphy in the upper Cretaceous-Paleocene of Seymour Island, Antarctica.

Selected Publications

Stratigraphy and sedimentology of the type San Francisquito Formation. Kooser, M.A., in Crowell and Link, eds., Geologic History of the Ridge Basin, Pacific Sec. SEPM, 53-61, 1982.

Paleocene Plesiosaur? Kooser, M.A., in Reynolds, ed., Geologic Investigations along Interstate 15, West. Assoc. Vert Paleontologists, 43-48, 1985.

Conglomerates and the reconstruction of strike slip fault zones: lessons from the Transverse Ranges, S. California. Sadler, P.M., Kooser, M. A., Renfrew, J.M., and Hillenbrand, J.M., in Colburn, Ivan P., Abbott, P.L., and Minch, J. (eds), Conglomerates in Basin Analysis: A Symposium Dedicated to A.O. Woodford: Pacific Section S.E.P.M., 62:33-52, 1989.







TIEN-CHANG LEE, Professor
Ph.D., University of Southern California, 1973
tclee@ucrac1.ucr.edu

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Research Interests
Terrestrial heat transfer; geothermal exploration, groundwater flow, fault zone characterization, basin configuration, finite-element modeling and its inversion.

Recent Projects
Groundwater recharge experiments, geophysical investigations of groundwater basins; exploration for low temperature resources, environmental geophysics.

Selected Publications

Thermal conductivity measured with a line source between two dissimilar media equals their mean conductivity. T-C Lee, J. Geophysical Research, 94:12443-12447, 1989.

Groundwater level and hydrochemistry in the San Jacinto Basin, Riverside County, California. M.J. Schlehuber, T-C Lee and B.S. Hall, J. Hydrology, 106:79-98, 1989.

Inversion modeling of gravity with prismatic mass bodies. T.C. Lee and S. Biehler, Geophysics, 1991.

An artificial recharge experiment in the San Jacinto basin, Riverside southern California. T-C Lee, A. E. Williams and C. Wang., J. Hydrology, 140, 235-259, 1992.

In situ determination of thrmal properties of sediments using an friction-heated probe scourse; T-C Lee and R.P von Herzen, J. Geophysical Research, 99:12,121-12,132, 1994.

Distortion in resistivity logging at shallow depth. T-C Lee and B.N. Damiata, Geophysics. In press.







MICHAEL A. MCKIBBEN, Associate Professor
Ph.D., Pennsylvania State University, 1984
mckibben@ucrac1.ucr.edu

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Research Interests
The geology and geochemistry of mineral and energy resources; mineralization and water-rock interaction in active geothermal systems; application of ion microprobe stable isotope microanalysis techniques to geochemical problems; sulfur geochemistry in volcanoes and magma-hydrothermal systems. Recipient of 1989 Lindgren Award for outstanding research in Economic Geology from the Society of Economic Geologists.

Recent Projects
Origin of anomalous sulfur in Mt. Pinatubo volcanic eruptions; genesis of Cu mineralization in the Viburnum Trend MVT Pb-Zn District, Missouri; epithermal gold mineralization in the Salton Trough, California; magma-hydrothermal processes in White Island volcano, New Zealand.; decarbonation of sediments and CO2 flux from Salton Trough rift.

Selected Publications

Metal speciation and solubility in saline hydrothermal fluids: an empirical approach based on geothermal brine data. McKibben, M.A., and Williams, A.E., Economic Geology, 84:1996-2007, 1989.

Radical sulfur isotope zonation of pyrite accompanying boiling and epithermal gold deposition: a SHRIMP study of the Valles Caldera. McKibben, M.A., and Eldridge, C.S., Economic Geology, 85:1917-1925, 1990.

Solubility and transport of PGE and Au in saline hydrothermal fluids: constraints from geothermal brine data. McKibben, M.A., Williams, A.E., and Hall, G.E.M., Economic Geology, 85:1926-1934, 1990.

Sulfur isotopic systematics of the June 1991 Mount Pinatubo eruptions: a SHRIMP ion microprobe study. McKibben, M.A. Eldridge, C.S., and Reyes, A.G., Mount Pinatubo Monograph, C.G. Newhall and R.S. Punongbayan (editors), USGS Professional Paper. (In press).

Ore-forming brines in active continental rifts. McKibben, M.A., and Hardie, L.A., in Barnes, H. L. (editor), Geochemistry of Hydrothermal Ore Deposits, 3rd Edition, Wiley-Interscience, N. Y. (In press).

Microscopic sulfur isotopic variations in ore minerals from the Viburnum Trend, SE Missouri, U.S.A.: a SHRIMP study. McKibben, M.A., and Eldridge, C.S., Economic Geology, 90, 228-245, 1995.







RICHARD A. MINNICH, Associate Professor
Ph.D., University of California, Los Angeles, 1978
minnich@ucrac1.ucr.edu

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Research Interests
Fire ecology of southern California, Baja California, and temperate Mexico; exotic plant invasions, climatic change.

Recent Projects
Fire history and vegetation dynamics in the Sierra San Pedro Martir, Baja California, Mexico. Changes in the coastal sage scrub of the Riverside/Perris plain. Fire and postfire succession in the Mojave Desert. Exotic/native herb dynamics in California annual grassland.

Selected Publications

Integration of Geographic Information Systems with a diagnostic wind field model for fire management. Minnich, R.A., Forest Science, 37:560-573, 1991.

Lightning detection rates and wildland fire in the mountains of northern Baja California, Mexico. Minnich, R.A., et al., Atmósfera, 6:235-253, 1993.

Sixty years of change in conifer forests of the San Bernardino Mountains: Reconstruction of California mixed conifer forests prior to fire suppression. Minnich, R.A. with M.G. Barbour, J.H. Burk and R.F. Fernav, Conservation Biology, Vol. 9, 1995.

Wildland fire and chaparral succession along the California-Baja California boundary. Minnich, R.A. (with C.J. Bahre). International Journal of Wildland Fire, 5:13-24, 1995.

Californian mixed coniferforests under unmanaged fire regimes in Sierra San Pedro Mártir, Baja California, Mexico. Minnich, R.A. (with J. Burk, M.G. Barbour, and J. Sosa-Ramírez). Journal of Biogeography (in press)







ISABEL P. MONTAÑEZ, Associate Professor
Ph.D., Virginia Polytechnic Institute, 1990
carblab@ucrac1.ucr.edu

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Research Interests
Carbonate diagenesis, cycle and sequence stratigraphy, relationship of sea level events, diagenesis and reservoir heterogeneity.

Recent Projects
Cycle and sequence stratigraphy of Cambrian peritidal carbonates of the Great Basin; high resolution textural and geochemical study of the stabilization process of dolomites; analysis of sea level controls on early diagenesis in cyclic carbonates; chemostratigraphy of Cambrian platform and basinal carbonates; geochemical analysis and direct age determination of hydrothermal dolomites associated with Mississippi Valley-type deposits as a mechanism for evaluating mechanisms and timing of basinwide fluid flow.

Selected Publications

Fluid-rock interaction history during stabilization of early dolomites of the Upper Knox Group (Early Ordovician), Appalachians. Montañez, I.P., and Read, J.F., Journal of Sedimentary Petrology, 62(5):753-778, 1992.

Controls of eustasy and associated diagenesis on reservoir heterogeneity in Lower Ordovician, Upper Knox carbonates, Appalachians. Montañez, I.P., in Candelaria, M., and Reed, C.A., eds., Paleokarst, Karst Related Diagenesis, and Reservoir Development: Examples from Ordovician-Devonian Age Strata of West Texas and the Mid-Continent: Permian Basin Section, Society of Economic Paleontologists and Mineralogists Special Publication No. 92-33, 165-181, 1992.

Alleghenian regional diagenesis: a response to the migration of modified metamorphic fluids derived from beneath the Blue Ridge-Piedmont thrust sheet. Schedl, A., McCabe, C., Montañez, I.P., Fullagar, P., and Valley, J., Journal of Geology, 100:339-352, 1992.

Parasequence stacking patterns, third-order accommodation events, and sequence stratigraphy of Middle to Upper Cambrian platform carbonates, Bonanza King Formation, southern Great Basin. Montañez, I.P., and Osleger, D.A. in Loucks, R.G., and Sarg, F.R., eds., Recent Advances and Applications of Carbonate Sequence Stratigraphy: American Association of Petroleum Geologists Memoir, No. 57, pp. 305-326, 1993.

Late diagenetic dolomitization of Lower Ordovician, Upper Knox Carbonates: A record of the hydrodynamic evolution of the southern Appalachian Basin: American Association of Petroleum Geologists Bulletin, v. 78 (8), pp. 1210-1239, 1994.







DOUGLAS M. MORTON, Adjunct Professor
Ph.D., Univ. of California, Los Angeles, 1966
scamp@ucrac1.ucr.edu

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Research Interests
Regional geology of southern California; tectonics; petrologic aspects of basement rocks of the Peninsular and Transverse Ranges, and landslide studies.

Recent Projects
Tectonics of the northern Peninsular Ranges; geology of the eastern San Gabriel mountains.

Selected Publications

A vanished late Pliocene to early Pleistocene alluvial-fan complex in the northern Perris Block, southern California, in Colburn, I.P., Abbott, P.L. and Minch, J. eds. Conglomerates in basin analysis: a symposium dedicated to A.O. Woodford; Pacific Section Society Economic Paleontologists and Mineralogists, v. 63, p. 73-80, 1989.

Geologic map of the Telegraph Peak quadrangle, southern California; U.S. Geological Survey Open-file map 90-701, Morton, D.M., Woodburne, M.O., and Foster, J., 1990.

Geologic map of the Devore Quadrangle, California. Morton, D.M., and J.C. Matti, U.S. Geol. Survey Open File Report 90-695, 1991.

The San Andreas fault system in the vicinity of the Central Transverse Ranges province, southern California: Matti, J.C., Morton, D.M., and Cox, B.F., U. S. Geological Survey Open-file Report 92-354, 1992.

Paleogeographic evolution of the San Andreas fault in southern California: a reconstruction based on a new cross-fault correlation. Matti, J.C. and Morton, D.M. in Powell, R.E., Weldon, R.J., and Matti, J., eds., The San Andreas fault system: Displacement, palinspastic reconstruction, and geologic evolution: Geological Society of America Memoir 178, 1993.

Extension and contraction within an evolving convergent strike-slip fault complex: the San Andreas and San Jacinto fault zones at the convergence in southern California: Morton, D.M., and Matti, J.C., in Powell, R.E., Weldon, R.J., and Matti, J.C., eds., The San Andreas fault system: Displacement, palinspastic reconstruction, and geologic evolution: Geological Society of America Memoir 178, 1993.







DAVID A. OSLEGER, Adjunct Assistant Professor
Ph.D., Virginia Polytechnic Institute, 1990
osleger@ucrac1.ucr.edu

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Research Interests
Carbonate and clastic sedimentology; stratigraphic cyclicity; sea-level history in relation to sequence stratigraphy; computer modelling of depositional systems; subsidence modelling and basin analysis.

Recent Projects
Cyclo- and sequence stratigraphy of Middle Cambrian rocks in the southern Great Basin and of Permian backreef carbonates of the Guadalupe Mountains, southern New Mexico.

Selected Publications

Comparative analysis of methods used to define eustatic variations in outcrop: Late Cambrian interbasinal sequence development. Osleger, D.A. and Read, J.F., American Journal of Science, 293:157-216, 1993.

Cross-platform architecture of a sequence boundary in a mixed siliciclastic-carbonate system, Middle Cambrian, southern Great Basin, U.S.A.: Sedimentology, v. 42, pp. 679-701.

Depositional sequences on Upper Cambrian carbonate platforms: Variable sedimetologic responses to allgoenic forcing: in B.U. Haq, eds., Sequence Stratigraphy and Depositional Response to Eustatic, Tectonic and Climatic Forcing, SEPM Special Volume # 14, pp. 247-276.







STEPHEN K. PARK, Associate Professor
Ph.D., Massachusetts Institute of Technology, 1984
magneto@ucrmt.ucr.edu

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Research Interests
Numerical modeling of electromagnetic fields around complex structures; magnetotelluric (MT) studies of crustal structure across convergent margins; inversion theory; detection of contaminants in subsurface; earthquake prediction, GIS applications to geological and geophysical data.

Recent Projects
3-D MT modeling of magma chambers; MT transect across central California; resistivity monitoring for earthquake prediction and for contaminant detection; imaging leaks in 3-D beneath brine pools.

Selected Publications

Magnetotelluric evidence for crustal suture zones bounding the southern Great Valley, California. Park, S.K., G.P. Biasi, R.L. Mackie, and T.R. Madden, Journal of Geoph. Res., 96(B1) pp. 353-376, 1991.

Inversion of pole-pole data for three-dimensional resistivity structure beneath arrays of electrodes. Park, S.K. and G.P. Van, Geophysics, 56(7):951-960, 1991.

Monitoring electrical resistivity changes prior to earthquakes in Parkfield, California with telluric arrays. Park, S.K., Journal of Geoph. Res., 96(B9):14,211-14,237, 1991.

Electromagnetic precursors to earthquakes in the ULF band: A review of observation and mechanisms. Park, S.K., M.J.S. Johnston, T.R. Madden, F.D. Morgan, and H.F. Morrison, Reviews of Geoph., May, 1993.







PETER M. SADLER, Professor and Chair
Ph.D., University of Bristol, U.K., 1973
sadler@ucrac1.ucr.edu

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Research Interests
Completeness of the stratigraphic record; quantitative biostratigraphy; rates of geologic processes; synorogenic sedimentation.

Recent Projects
Stochastic simulations of stratigraphic sections; rate balances in the accumulation of shallow marine carbonates; stratigraphic correlation as constrained optimization; mid-Ordovician biostratigraphy

Selected Publications

A prototype constrained optimization solution to the time correlation problem. Kemple, W.G., Sadler, P.M., and Strauss, D.J., Geological Survey of Canada, Paper 89-9, p. 417-425, 1989.

Estimation of the completeness of stratigraphical sections using empirical data and theoretical models. Sadler, P.M. and Strauss, D.J., Journal of the Geological Society of London, v. 147, p. 471-485, 1990

The Santa Ana Basin of the Central San Bernardino Mountains: evidence of the timing of uplift and strike slip relative to the San Gabriel Mountains. GSA Memoir 178, p. 307-321, 1993.

Models of time-averaging as a maturation process: How soon do sedimentary sections escape reworking? Paleontological Society Short Courses in Paleontology, v. 6, p. 188-209, 1993.

On the labelling, length and objective basis of Fischer plots. Sadler, P.M., Osleger, D.A., and Montañez, I.P., Journal of Sedimentary Petrology, v. 63, p. 360-368, 1993

The expected duration of upward-shallowing peritidal carbonate cycles and their terminal hiatuses. Geological Society of America Bulletin,106, pp. 791-802, 1994.







THOMAS A. SCOTT, Adjunct Assistant Professor
Ph.D. University of California, Berkeley, 1987
tomscott@ucrac1.ucr.edu

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Research Interests
Biogeography, conservation biology, wildlife management.

Recent Projects
Wildlife conservation in fragmented and altered landscapes, including studies of wildlife movement, habitat use, and population biology in oak woodland, sage scrub, and riparian habitats; behavioral changes and adjustments in habitat use of woodland bird species in response to human activities; the conservation and management of island bird species through captive propagation, predator control, and habitat restoration.

Selected Publications

Initial effect of housing construction on birds in an oak woodland at the wildland urban interface. Scott, T.A., pp. 181- 188, in Keeley, J. (ed) Proceedings of the Symposium: Interface Between Ecology and Land Development in California, Southern California Academy of Sciences, p. 297, 1993.

Wildlife-Habitat restoration in an urban park in Southern California. Morrison, M.L., Scott, T.A., and Tennant, T., Restoration Ecology, 2:17-30, 1994.

Irruptive Dispersal of Black-shouldered kites to a near shore island. Scott, T.A., The Condor, 96:197-200, 1994.

Opportunistic foraging in Loggerhead Shrikes. Scott, T.A. and Morrison, M.L., in Yosef, R. Proceedings of an International Symposium on the Lanidae and their allies, (in press).

Wildlife-habitat restoration in an urban park in southern California. Morrison, M.L., Scott, T.A., and Tenant, T., Environmental Management, (in press).







VICTORIA R. TODD, Adjunct Associate Professor
Ph.D., Stanford University, 1973

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Research Interests
Igneous and metamorphic petrology, structural geology, and regional tectonics with emphasis on field mapping; Cordilleran batholiths; Peninsular Ranges batholith.

Recent Projects
Mapping, geochemical, and dating studies of igneous rocks in Mezozoic Peninsular Ranges batholith of San Diego Co., California.

Selected Publications

Metamorphic and tectonic evolution of the northern Peninsular Ranges batholith, southern California. V.R. Todd, B.G. Erskine, and D.M. Morton, in Metamorphic and crustal evolution of western U.S., Rubey Vol. VII, W.G. Ernst (ed.), Prentice-Hall, 43 pp., 1988.

S-type granitoids and I-S line in the Peninsular Ranges batholith, southern California. V.R. Todd and S.E. Shaw, Geology Magazine, 4 pp., 1985.

Geologic map of the Doe Mountain quadrangle, Okanogan County, Washington: U.S. Geological Survey Miscellaneous Field Studies Report. V.R. Todd, 45 pp., map scale 1:62,500, in press.

Geologic map of the El Cajon 30' x 60' quadrangle, San Diego and Imperial Counties, Califonia: U.S. Geogical Survey Open-File Report OF 94-18. V.R. Todd, map scale 1:100,000. In press.







ALAN E. WILLIAMS, Associate Professor
Ph.D., Brown University, 1980
williams@ucrac1.ucr.edu

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Research Interests
Stable isotope geochemistry; chemical and isotopic interaction of water and rock in active and fossil hydrothermal circulation systems; hydrothermal metamorphism; elemental transport in active geothermal systems; chemistry and transport of ground waters.

Recent Projects
Metamorphic and isotopic studies of the Cerro Prieto geothermal field, Mexico; stable isotope chemistry of the Del Puerto and Point Sal ophiolites, California; hydrothermal interaction in the Salton Sea and Coso geothermal fields, California; ground water transport in San Jacinto, California; natural degradation and movement of nitrate in waste water.

Selected Publications

An Overview of Fluid Geochemistry and Ore Genesis in the Salton Sea Geothermal System, and Comparison with the Gulf of California Hydrothermal Systems. Williams, A.E., M.A. McKibben and C.S. Eldridge, Chapter 37 In: J. P. Dauphin and B.R.T. Simoneit, eds., The Gulf and Peninsular Province of the Californias, American Association of Petroleum Geologists Memoir, No. 47, pp. 781-792, 1991.

Hydrothermal Metamorphism in Oceanic Crust From the California Coast Ranges Ophiolite: Submarine Fluid-Rock Interaction in Rifted Island Arcs and Sediment-covered Spreading Centers. Schiffman P., R.C. Evarts, A. E. Williams, and W.J. Pickthorn, In: T.J. Peters, A. Nicolas and R.G. Coleman, eds, Ophiolite Genesis and Evolution of the Oceanic Lithosphere, pp. 399-425, 1991.

Gas Measurement on Geothermal Fluids Trapped in Fracture Filling Minerals: A New Window into the History of Geothermal Systems. Williams, A.E., M. A. McKibben, and R. C. Sloan, Jr., Geothermal Resources Council Transactions, Vol. 16, pp. 199-204, 1992.







MICHAEL O. WOODBURNE, Professor Emeritus
Ph.D., University of California, Berkeley, 1966
mows@ucrac1.ucr.edu

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Research Interests
Accuracy in chronostratigraphy; evolution and biostratigraphy of Cretaceous and Tertiary-aged mammals of the southern hemisphere, especially Australia, Antarctica, and South America; Cenozoic biochronology of fossil mammals of North America; historical geology, stratigraphy, paleontology, and tectonic analysis of Tertiary-aged terranes of southern California.

Recent Projects
Small mammal biostratigraphy and biochronology of Miocene strata, South Australia; mammalian paleontology and biogeography of Seymour Island, Antarctic Peninsula; magnetostratigraphy and biostratigraphy of the Barstovian mammal age in southern California; editor, "Cenozoic Mammals of North America, Geochronology and Biostratigraphy."

Selected Publications

The first land mammal from Antarctica and its biogeographic implications. Woodburne, M.O., and W.J. Zinsmeister, Jour. Paleon., 58(4):913-948, 1984.

Cenozoic mammals of North America. Geochronology and biostratigraphy. Woodburne, M.O., ed., University of California, Press, Berkeley. i-xv:1-290, 1987.

Lithostratigraphy, Biostratigraphy and Geochronology of the Barstow Formation Mojave Desert, southern California. Woodburne, M.O., R.H. Tedford, and C.C. Swisher, III, Bull. Geol. Soc. Amer., 102:459-477, 1990.

Land mammal biostratigraphy and magnetostratigraphy of the Etadunna Formation (late Oligocene) of South Australia. Woodburne, M.O., MacFadden, B.J., Case, J.A., Springer, M., Pledge, N.S., Power, J.D., Woodburne, J.M. and Johnson, K., Jour. Vert. Paleo, 13(4): 132-164, 1994.

Land mammal high resolution geochronology, intercontinental overland dispersals, sea-level, climate, and vicariance. Woodburne, M.O. and C.C. Swisher, III in W.A. Berggren, D.V. Kent, and J. Hardenbol (eds.). Geochronology, time- scales and stratigraphic correlation framework for an historical geology. Society of Stratigraphic Geology. In Press.

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