---

Brooks Ellwood, Ph.D
Professor

Geophysics, Rock Magnetism, Stratigraphy, Geoarchaeology

Education:

Ph.D. 1977.  University of Rhode Island, Graduate School of Oceanography.
MS 1974.  University of Rhode Island, Graduate School of Oceanography.
BS 1970.  Florida State University, Department of Geology.

Academic Experience:

1999--      Professor and Chair, Department of Geology and Geophysics, LSU
1988-99   Professor, Department of Geology, UT Arlington
1997-99   Professor, Sociology and Anthropology at UT Arlington (joint appointment)
1989-92   Professor and Acting Chair, Department of Geology, UT Arlington
1983-88   Associate Professor, Department of Geology, UT Arlington
1981-83   Associate Professor, University of Georgia
1977-81   Assistant Professor, University of Georgia
1976-77   Research Associate (Post Doc), Ohio State University
1970-76   Research Assistant, University of Rhode Island
1969-70   Teaching Assistant, Florida State University

ellwood@lsu.edu

Office: (225) 578-3416; Labs: (225) 578-4399; 5999

Brief Summary:

Rock magnetic/geophysical/geoarchaeological studies in Europe, Africa, Asia and North America. Current projects include the study of bolide impact evidence in marine sections; development of new magnetosusceptibility global correlation techniques in North Africa, Europe and the US; study of Global boundary Stratotype Section and Point (GSSP) localities; geoarchaeological and paleoclimate studies applied to Middle and Upper Paleolithic (Quaternary) cave sites in Europe; and magnetic studies applied to a broad range of lithologies.

Selected reviewed published research by topic below.

As a geologist you never know what you might find!  Natural in Wrangell-St. Elias National Park and Preserve, Alaska.

EXAMPLES OF WORK OUR GROUP, FACULTY, STUDENTS AND ASSOCIATES, ARE DOING:

Global Correlations:

     Working in conjunction with an international group of colleagues, we have been using magnetic susceptibility (MS) measurements of Paleozoic and Mesozoic marine rocks, in conjunction with biostratigraphic control, for high-resolution chronocorrelation and have named the method MagnetoSusceptibility Event and Cyclostratigraphy (MSEC).  MSEC is a composite of the MS record of marine strata and the coeval biostratigraphic record, and MSEC chronozones have boundaries which are isochronous (see Ellwood et al. 1999; 2000; 2001, and Crick et al., 1997; 2000, 2001; 2002 as an examples of this work).  MS in marine sediments is a measure of the concentration of magnetic grains that are dominated by the detrital input of lithogenic material due primarily to global sea level changes, climate, and sea floor/basin subsidence.  In those sections we have examined, MSEC event trends of increasing MS magnitudes correlate well with episodes of regression, while trends of decreasing MS magnitudes correlate with episodes of transgression.
     The primary controls on the MSEC signatures in marine rocks are sea-level (base-level) changes and climate.  MSEC events can result from global sea-level fluctuations causing (1) base level changes and therefore corresponding changes in detrital influx into the worlds oceans, (2) changes in global climate, or (3) result from local small-scale tectonic effects.  During times of sea level regression, base level is lowered and increased erosion brings an increased detrital component into the marine system, primarily from rivers.  This material is then dispersed by bottom currents throughout ocean basins and MS magnitudes rise.
     Much of the MSEC work has concentrated on Devonian rock sequences from North Africa and Europe but the method is applicable to marine rocks of any age for global correlation.  Early work has demonstrated clear correlations between multiple sections from Africa, Europe and North America, including both pelagic and neritic environments.

Research in Morocco, North Africa

Reference: Ellwood, B.B., Crick, R.E., and El Hassani, A., 1999.  The MagnetoSusceptibility Event and Cyclostratigraphy (MSEC) Method Used in Geological Correlation of Devonian Rocks from Anti-Atlas Morocco, AAPG Bulletin, 83, 1119-1134 (includes cover photo).

Environmental and Geoarchaeological Studies:

A new method for inter- and intrasite correlation and paleoclimate estimation, that can also help resolve age ambiguities within and between archaeological sites, has been applied to archaeological sites from Albania, Belgium, France, Portugal, and Spain.  This method, magnetosusceptibility event and cyclostratigraphy (MSEC) is based on magnetic susceptibility (MS) measurements of sediment samples.  In this context, the MSEC method involves building a composite reference section (CRS) from samples collected at archaeological excavations and for which the MS is measured.  This MSEC CRS then serves as a standard to which MSEC data from other excavations can be compared.
     Our early MSEC research has provided three important results.  First, this work has shown that MS data can be used in a number of environments for correlations between excavations.  Second, this research has shown that MSEC data can provide a paleoclimate proxy, as confirmed by independent climate indicators.  Third, results have shown that MSEC data can be used to for determining relative ages of sediments associated with human occupations.  When combined with isotopic ages and paleontological data sets, the MSEC CRS has the potential for estimating ages within sites at resolutions greater than in the past.  This is possible because MSEC zones provide time-synchronous boundaries to which MSEC data from individual excavations can be compared.      Early work on sediments from Middle/Upper Paleolithic and Neolithic cave sites has shown that fluctuations in MS values result from changing climate (temperature/moisture), causing regional changes in pedogenesis of sediments forming outside of caves or deep rock shelters.  These sediments are then eroded and deposited within sites and are the primary control on the observed MS in collected samples.  Lower MS magnitudes have been shown to represent times of generally cooler climate, while warmer times yield higher MS values.  Distinctive fluctuations in MS magnitudes and trends are the basis for intra- and intersite correlations while also indicative of paleoclimate trends.

Block on the left is research we have done in Carlsbad Caverns National Park. Here we are recovering a 3 m core from the Texas Toothpick, a standing speleothem located in Lower Cave at the end of the Big Room in Carlsbad Cavern.

In addition to this work, we have been involved for a number of years in other types of geoarchaeological investigations, using electrical and magnetic methods.  This work includes investigations of environmental hazards, in locating buried metallic objects, and in monitoring the flow of underground contaminants. These methods have also been used to delineate features indicative of human occupation such as graves, fire pits, building sites, and other areas of ground disturbance. Some sites have been dated using paleomagnetic measurements (archaeomagnetic dating). Electrical resistivity methods are used in basin analysis, in archaeological site surveys, in delineation of burial sites, and in determining the depth of subsurface horizons which are likely pollution migration pathways, such as the water table. Magnetic surveys have been used to identify cultural material at archeological sites previously located by other means.  These surveys are designed to help archaeologists and engineers evaluate the subsurface at reduced cost and to isolate buried objects using remote sensing techniques.  A number of studies also involve research in National Parks.

Selected Reviewed Published Research by Topic (alphabetical):

Air Pollution Studies
Basalts
    a. general
    b. marine
Cave Research
Coal Research
Exploration Geophysics
General
Geoarchaeology
Global Correlation
Granites
Hydrocarbon Research
Instrumental
Magnetic Field Studies
Metamorphic Rocks
Mineral Studies
National Parks
Paleoceanography
Paleoclimate
Paleontology
Sediments
    a.   general
    b.   marine
    c.   paleoceanography
Statistics
Stratigraphy
Structure
Theory
Video Programs
Volcanic

Air Pollution Studies

• Petrovsky, E. and Ellwood, B.B., 1999, Magnetic Monitoring of Air, Land and Water Pollution, Ch. 8 in Quaternary Climates, Environments and Magnetism, ed. Maher, B. and Thompson, R., Cambridge University Press, 335pp.

Basaltic Rocks/General

• Ellwood, B.B. and Fisk, M.R., 1977.  Anisotropy of magnetic susceptibility variations in a single Icelandic columnar basalt, Earth and Planetary Science Letters, 35, 116-122.
• Ellwood, B.B., 1979.  Anisotropy of magnetic susceptibility variations in Icelandic columnar basalts, Earth and Planetary Science Letters, 42, 209-212.
• Ellwood, B.B., 1984.  Anisotropy of magnetic susceptibility data indicating remagnetization in Russell Dam, South Carolina diabase dikes, Geophysical Research Letters, 11, 101-104.

Basalts/Marine

• Ellwood, B.B., 1975.  Analysis of emplacement mode in basalt from DSDP Holes 319A and 321 using anisotropy of magnetic susceptibility, Journal of Geophysical Research, 80, 4805-4808.
• Ellwood, B.B. and Watkins, N.D., 1976.  Diagnosis of emplacement mode of basalt in Hole 319A and Site 321, in Initial Reports of the Deep Sea Drilling Project, XXXIV, 495-499.
• Ellwood, B.B. and Watkins, N.D., 1976.  Diagnosis of observed intrusive and extrusive ratios in Iceland and the Troodos Massif with experimental emplacement mode analysis of DSDP igneous rocks, Journal of Geophysical Research, 81, 4152-4156.
• Ellwood, B.B. and Watkins, N.D., 1977.  Some magnetic properties of specimens from Holes 332B, 334, 335 and corresponding analysis in terms of emplacement mode, in Initial Reports of the Deep Sea Drilling Project, XXXVII, 511-514.
• Ellwood, B.B., 1978.  Flow and emplacement direction determined for selected basaltic bodies using magnetic susceptibility anisotropy measurements, Earth and Planetary Science Letters, 41, 254-265.
• Ellwood, B.B. and Watkins, N.D., 1979.  Experimental emplacement mode determination on basalt in Hole 396B, in Initial Reports of the Deep Sea Drilling Project, XLVI, 363-367.

Cave Research

• Ellwood, B.B., 1971.  An archeomagnetic measurement of the age and sedimentation rate of Climax Cave sediments, southwest Georgia, American Journal of Science, 271, 304-310.
• Brook, G. A., Burney, D. A., Cowart, J. B., and Ellwood, B. B., 1990, Present and former deserts: evidence of environmental change from cave sediments in East Africa and the American Southwest, Studia Carsologica 2, Publication of IGCP 252, 19-28.
• Ellwood, B.B., Petruso, K.M., and Harrold, F.B., 1996,  The Utility of Magnetic Susceptibility for Detecting Paleoclimatic Trends and as a Stratigraphic Correlation Tool:  An Example from Konispol Cave Sediments, SW Albania, Journal of Field Archaeology, 23, 263-271.
• Ellwood, B.B., Petruso, K.M., Harrold, F.B., and , Schuldenrein, J., 1997, High-Resolution Paleoclimatic Trends for the Holocene Identified Using Magnetic Susceptibility Data from Archaeological Excavations in Caves, Journal of Archaeological Sciences, 24, 569-573.
• Ellwood, B.B., Zilhão, J., Harrold, F.B., Balsam, W., Burkart, B., Long, G.J., Debénath, A., and Bouzouggar, A., 1998.  Identification of the Last Glacial Maximum in the Upper Paleolithic of Portugal using magnetic susceptibility measurements of Caldeirão Cave sediments, Geoarchaeology, 13, 55-71.
• Ellwood, B.B., Villaverde, V., Benoist, S.L., Bernabeu, J., Harrold, F.B. and Thacker, P.T., 200o. A Test of the MSEC Method for Paleoclimate and Intersite Correlations from Late Pleistocene/Holocene Cave Sites in Southern Europe: Results from Cova de les Cendres, SE Spain "Espacio, Tiempo y Forma, Serie I, Prehistoria y Arqueologia, 13, 141-159.
• Ellwood, B.B., Harrold, F.B., Benoist, S.L., Straus, L.G., Gonzalez-Morales, M., Petruso, K., Bicho, N.F., Zilhão, Z., and Soler, N., 2001. Paleoclimate and Intersite Correlations from Late Pleistocene/Holocene Cave Sites: Results from Southern Europe, Geoarchaeology, v.16, 433-463.
• Thacker, P. and Ellwood, B.B., 2001. The magnetic susceptibility of cherts: archaeological and geochemical implications of source variation. Geoarchaeology, 17, 465-482.
• Harrold, F., B. Ellwood, P. Thacker, and S. Benoist, 2004. Magnetic susceptibility analysis of sediments at the Middle-Upper Paleolithic transition for two cave sites in northern Spain. ZILHÃO, J.; D'ERRICO, F. (eds.) The Chronology of the Aurignacian and of the Transitional Technocomplexes. Dating, Stratigraphies, Cultural Implications, Trabalhos de Arqueologia 33. Lisboa, Instituto Português de Arqueologia, 301-310.
• Ellwood, B.B., Harrold, F.B., Benoist, S.L., Thacker, P., Otte, M., Bonjean, D., Long, G.L., Shahin, A.M., Hermann, R.P., Grandjean, F., 2004, Magnetic Susceptibility Applied as an Age-Depth-Climate Relative Dating Technique Using Sediments from Scladina Cave, a Late Pleistocene Cave Site in Belgium, J. archaeological Science, 31, 283-293.
  

Coal

• Ellwood, B.B. and Noltimier, H.C., 1978.  Anisotropy of magnetic susceptibility measurements as a coal banding-plane indicator, Nature, 274, 353-354.
• Ellwood, B.B., 1979.  Magnetic susceptibility anisotropy measurements of coal from the South Wales Coal Field:  A coalification process indicator, Geophysical Journal, 57, 431-443.

Exploration Geophysics/Geoarchaeology

• Ellwood, B.B., 1989, Geophysical exploration for mineral deposits, in Concise Encyclopedia of Mineral Resources, edited by Carr, D.D. and Herz, N., Pergamon Press, Oxford, 147-151.
• Ellwood, B.B., Payne, J., and Long, G.J., 1989, The Rockwall, Texas: A study of unusual natural magnetic effects in geoarcheological surveys produced by mineral oxidation, Geoarchaeology, 4, 103-118.
• Ellwood, B.B., 1990, Electrical Resistivity Surveys in Two Historical Cemeteries, NE Texas: A Method for Delineating Unidentified Burial Shafts, Historical Archaeology, 24 (3) 91-98.
• Darwin, R.L., Ferring, C.R., and Ellwood, B.B., 1990, Geoelectric stratigraphy and subsurface evaluation of Quaternary deposits at Cooper Basin, northeast Texas, Geoarchaeology, 5 (1) 53-79.
• Petruso, K., Ellwood, B.B., Harrold, F.B., 1992,  The Sarandë Project 1992:  Investigations in Southern Albania, Old World Archaeology Newsletter, 16, 4-7.
• Ellwood, B.B. and Harrold, F.B. Jr., 1993, Unusual electrical resistivity effects associated with fast-growing trees, Rio Maior, Portugal, Geoarchaeology, 8, 157-162.
• Ellwood, B.B., Harrold, F.B., Petruso, K.M., and Korkuti, M., 1993, Electrical resistivity surveys as indicators of site potential: examples from a rock shelter in southwestern France and a cave in southern Albania, Geoarchaeology, 8, 217-227.
• Ellwood, B.B., Owsley, D.W., Ellwood, S.H., and Mercado-Allinger, P., 1994, Search for the grave of the notorious Texas outlaw William "Wild Bill" Longley, Historical Archaeology, 28, 94-112.
• Petruso, K.M., Ellwood, B.B., Harrold, F.B., and Korkuti, M., 1994, Radiocarbon and archaeomagnetic dates from Konispol Cave, Albania, Antiquities, 68: 335-339.
• Ellwood, B.B., Harrold, F.B. and Marks, A.E., 1994, Site identification and correlation using geoarcheological methods at the Cabeço do Porto Marinho (CPM) locality, Rio Maior, Portugal, Journal of Archaeological Science, 21, 779-784.
• Ellwood, B.B., Peter, D.E., Balsam, W., and Schieber, J., 1995, Magnetic and Geochemical Variations as Indicators of Paleoclimate and Archaeological Site Evolution:  Examples from 41TR68, Fort Worth, Texas, Journal of Archaeological Science, 22, 409-415.
• Tuffreau, A., Antooine, P., Chase, P.G., Dibble, H.L., Ellwood, B.B., van Kolfschoten, T., Lamotte, A., Laurent, M., McPherron, S.P., Moigne, A.-M., Munaut, A.V., 1995, Le Gisement Acheuléen de Cagny-L'Épinette (Somme), Bulletin de la Société Préhistorique FranÇaise, 92, 169-191.
• Thacker, P. and Ellwood, B.B., 2001. The magnetic susceptibility of cherts: archaeological and geochemical implications of source variation. Geoarchaeology, 17, 465-482.
• Thacker, P., Ellwood, B.B., and Pereira, C., 2002. Detecting Paleolithic Activity Areas Through Electrical Resistivity Survey: An Assessment from Vale de Obidos, Portugal. Journal of Archaeological Science, 29, 563-570.
  
• Owsley, D.W., Ellwood, B.B., and Melton, T., 2006. Search for the grave of William Preston Longley, hanged Texas Gunfighter, Historical Archaeology, 40, 50-63.

General

• MacDonald, W.D. and Ellwood, B.B., 1987, Anisotropy of magnetic susceptibility: Sedimentological, igneous and structural-tectonic applications, Reviews in Geophysics, 25, 905-909.
• Ellwood, B.B., Hrouda, F. and Wagner, J.-J., 1988, Symposia on magnetic fabrics: Introductory comments, Physics of the Earth and Planetary Interiors, 51, 249-252.
• Ellwood, B.B., Benoist, S.L., El Hassani, A., Wheeler, C., and Crick, R.E., 2003. Impact Ejecta Layer from the Mid-Devonian: Possible Connection to Global Mass Extinctions. Science, 300, 1734-1737.
  
• Ellwood, B.B., Benoist, S.L., El Hassani, A., Wheeler, C., and Crick, R.E., 2004. Response to Comment on "Impact Ejecta Layer from the Mid-Devonian: Possible Connection to Global Mass Extinctions." Science, 303, Technical Comment: 471; 471c: 1-2.
• Ellwood, B.B., 2005. Norman D. Watkins: A brief biography, Encyclopedia of Geomagnetism and Paleomagnetism, Springer, in press.
• Ellwood, B.B., 2005. Low-Field magnetic susceptibility (MS) of sediments and sedimentary rocks: A general overview of active research areas, Encyclopedia of Geomagnetism and Paleomagnetism, Springer, in press.
  

Granites

• Ellwood, B.B. and Whitney, J.A., 1980.  Magnetic fabric of the Elberton granite, N.E. Georgia, Journal of Geophysical Research, 85, 1481-1486.
• Ellwood, B.B., Whitney, J.A., Wenner, C.B., Mose, D., and Amerigian, C., 1980.  Age, paleomagnetism, and tectonic significance of the Elberton granite, Northeast Georgia Piedmont, Journal of Geophysical Research, 85, 6521-6533.
• Ellwood, B.B. and Wenner, D.B., 1981.  Correlation of magnetic susceptibility and oxygen isotopic values in late orogenic granites of the southern Appalachian Piedmont, Earth and Planetary Science Letters, 54, 200-202.
• Ellwood, B.B., 1981.  Weathering effects on the magnetic properties of the Milledgeville granite, Georgia, Earth and Planetary Science Letters, 55, 311-316.
• Ellwood, B.B., 1982.  Paleomagnetic evidence for the continuity and independent movement of a distinct major crustal block in the southern Appalachians, Journal of Geophysical Research, 87, 5339-5350.
• Davison, F.C., Jr. and Ellwood, B.B., 1983.  Thermomagnetic characteristics in late orogenic granites and gneisses of the southern Appalachian Piedmont, Earth and Planetary Science Letters, 64, 177-182.

Hydrocarbon Research

• Ellwood, B.B., Stormer, J.C., Jr., Wenner, D.B., Whitney, J.A., and Reuter, J.A., 1980. A discussion of the hydrocarbon potential of rocks underlying the southern Appalachian Piedmont Allochton, Geology, 8, 205-206.
• Ellwood, B.B., and S.G. Pemberton, 1984. Some magnetic properties of Athabasca Oil Sand samples, Alberta, Canada, Canadian Journal of Earth Sciences, 21, 278-283.
• Ellwood, B.B. and Crick, R.E., 1988, Paleomagnetism of Paleozoic asphaltic deposits in southern Oklahoma, USA, Geophysical Research Letters, 15, 436-439.
• Ellwood, B.B. and Burkart, B., 1996, A test of hydrocarbon-induced magnetic patterns in soils: the sanitary landfill as laboratory, in D. Schumacher and M.A. Abrams, eds., Hydrocarbon migration and its near-surface expression: AAPG Memoir 66, p. 91-98.

Instrumental/Theory/Techniques

• Ellwood, B.B., 1978.  Measurement of anisotropy of magnetic susceptibility: A comparison of the precision of torque and spinner magnetometer systems for basaltic specimens, Journal of Physics E: Scientific Instruments, 11, 71-75.
• Ellwood, B.B., 1984.  Anisotropy of magnetic susceptibility: empirical evaluation of instrumental precision, Geophysical Research Letters, 11, 645-648.
• McCabe, C., Jackson, M. and Ellwood, B.B., 1985, Magnetic anisotropy in the Trenton limestone: Results of a new technique, anisotropy of anhysteretic susceptibility, Geophysical Research Letters, 12, 333-336.
• Schmidt, V.A., Ellwood, B.B., Nagata, T., and Noltimier, H.C., 1988, The measurement of anisotropy of magnetic susceptibility (AMS) using a cryogenic (SQUID) magnetometer and a comparison with results from a torsion-fiber magnetometer, Physics of the Earth and Planetary Interiors, 51, 365-378.
• Jackson, M., Sprowl, D., and Ellwood, B., 1989, Anisotropies of partial anhysteretic remanence and susceptibility in compacted black shales:  grain size- and composition-dependent magnetic fabric, Geophysical Research Letters, 16, 1063-1066.
• Ellwood, B.B., MacDonald, W.D. and Wolff, J.A., 1993, The slot technique for rock magnetic sampling, Physics of the Earth and Planetary Interiors, 78, 51-56.
• Ellwood, B.B., Terrell, G.E. and Cook, W.J., 1993, Frequency dependence and the electromagnetic susceptibility tensor in magnetic fabric studies, Physics of the Earth and Planetary Interiors, 80, 65-74.

Magnetic Field Studies

• Ellwood, B.B., Watkins, N.D., Amerigian, C., and Self, S., 1973.  Geomagnetic secular variation of Terceira Island, central North Atlantic, Journal of Geophysical Research, 78, 8699-8710.
• Amerigian, C., Watkins, N.D., and Ellwood, B.B., 1974.  Brunhes epoch geomagnetic secular variation on Marion Island: Contribution to evidence for long term regional geomagnetic variation maximum, Journal of Geomagnetism and Geoelectricity, 226, 429-441.
• Marino, R.J. and Ellwood, B.B., 1978.  Anomalous magnetic fabric in sediments which record an apparent geomagnetic field excursion, Nature, 274, 581-582.

Metamorphic/Structure

• Ellwood, B.B. and Abrams, C., 1982.  Magnetization of the Austell gneiss, N.W. Georgia Piedmont, Journal of Geophysical Research, 87, 3033-3043.
• MacDonald, W.D. and Ellwood, B.B., 1985, Magnetic fabric and petrofabric of the Tinaquillo Peridotite: 6th Venezuelan Geologic Congress, Venezuelan Society of Geologists, Caracas, Memoir IV, 2470-2482.
• MacDonald, W.D. and Ellwood, B.B., 1988, Magnetic fabric of peridotite with intersecting petrofabric surfaces, Tinaquillo, Venezuela, Physics of the Earth and Planetary Interiors, 51, 301-312.
• Mims, C.V.H., Powell, C.A., and Ellwood, B.B., 1990.  Magnetic susceptibility anisotropy of rocks in the Nutbush Creek ductile shear zone, North Carolina, Tectonophysics, 178, 207-223.
• MacDonald, W.D. and Ellwood, B.B., 1990, Comparison of magnetic and structural fabrics, Whipple Wash detachment structure, Whipple Wash, California, Physics of the Earth and Planetary Interiors, 64, 355-366.

Mineral Studies

• Ellwood, B.B., Balsam, W., Burkart, B., Long, G.J. and Buhl, M.L., 1986, Anomalous magnetic properties in rocks containing the mineral siderite: Paleomagnetic implications, Journal of Geophysical Research, 91, 12,779-12,790.
• Ellwood, B.B., Chrzanowski, T.H., Hrouda, F., Long, G.J., and Buhl, M.L., 1988, Siderite formation in anoxic deep-sea sediments: a synergetic bacterially controlled process with important implications in paleomagnetism, Geology, 16, 980-982.
• Ellwood, B.B., Burkart, B., Rajeshwar, K., Darwin, R.L., Neeley, R.A., McCall, A.B., Long, G.J., Buhl, M.L., and Hickcox, C.W., 1989, Are the iron carbonate minerals, ankerite and ferroan dolomite, like siderite, important in paleomagnetism?, Journal of Geophysical Research, 94, 7321-7331.

National Parks

• Ellwood, B.B., 1996, Geology and America's National Park Areas, Prentice Hall, 373 pp.

Paleoclimate

• Brook, G. A., Burney, D. A., Cowart, J. B., and Ellwood, B. B., 1990, Present and former deserts: evidence of environmental change from cave sediments in East Africa and the American Southwest, Studia Carsologica 2, Publication of IGCP 252, 19-28.
• Ellwood, B.B., Petruso, K.M., and Harrold, F.B., 1996,  The Utility of Magnetic Susceptibility for Detecting Paleoclimatic Trends and as a Stratigraphic Correlation Tool:  An Example from Konispol Cave Sediments, SW Albania, Journal of Field Archaeology, 23, 263-271.
• Ellwood, B.B., Petruso, K.M., Harrold, F.B., and , Schuldenrein, J., 1997, High-Resolution Paleoclimatic Trends for the Holocene Identified Using Magnetic Susceptibility Data from Archaeological Excavations in Caves, Journal of Archaeological Sciences, 24, 569-573.
• Ellwood, B.B., Zilhão, J., Harrold, F.B., Balsam, W., Burkart, B., Long, G.J., Debénath, A., and Bouzouggar, A., 1998.  Identification of the Last Glacial Maximum in the Upper Paleolithic of Portugal using magnetic susceptibility measurements of Caldeirão Cave sediments, Geoarchaeology, 13, 55-71.
• Ellwood, B.B., Villaverde, V., Benoist, S.L., Bernabeu, J., Harrold, F.B. and Thacker, P.T., 200o. A Test of the MSEC Method for Paleoclimate and Intersite Correlations from Late Pleistocene/Holocene Cave Sites in Southern Europe: Results from Cova de les Cendres, SE Spain "Espacio, Tiempo y Forma, Serie I, Prehistoria y Arqueologia, 13, 141-159.
• Ellwood, B.B., Harrold, F.B., Benoist, S.L., Straus, L.G., Gonzalez-Morales, M., Petruso, K., Bicho, N.F., Zilhão, Z., and Soler, N., 2001. Paleoclimate and Intersite Correlations from Late Pleistocene/Holocene Cave Sites: Results from Southern Europe, Geoarchaeology, v.16, 433-463.
• Thacker, P., Ellwood, B.B., and Pereira, C., 2002. Detecting Paleolithic Activity Areas Through Electrical Resistivity Survey: An Assessment from Vale de Obidos, Portugal. Journal of Archaeological Science, in press.

Paleoclimate/Paleoceanography

• Vella, P., Ellwood, B.B., and Watkins, N.D., 1975.  Surface water temperature changes in the southern ocean southwest of Australia during the last one million years, Special Bull. Roy. Soc. N.Z., Quaternary studies: A selection of papers presented at the IX INQUA congress, New Zealand, 1973, 13, 197-209.
• Ledbetter, M.T., Williams, D.F. and Ellwood, B.B., 1978.  Late Pliocene climate and SSW Atlantic abyssal circulation, Nature, 274, 581-582.
• Ellwood, B.B. and Ledbetter, M.T., 1979.  Paleocurrent indicators in deep-sea sediment, Science, 103, 1335-1337.
• Ciesielski, P.F., Ledbetter, M.T. and Ellwood, B.B., 1982.  The development of Antarctic glaciation and the Neogene paleoenvironment of the Maurice Ewing Bank, Antarctic, Marine Geology, 46, 1-51.
• Balsam, W., Ellwood, B.B., and Ji, J., 2005, Direct correlation of the marine oxygen isotope record with Loess Plateau iron oxide and magnetic susceptibility records. Palaeogeography, Palaeoclimatology, Palaeoecology, 221, 141-152.
  

Paleontology

• Swift, C. and Ellwood, B.B., 1972.  Hypsocephalus Atlanticus, a new genus and species of Lutjanid fish from marine Eocene limestones of northern Florida, Contributions in Science, 230, 1-29.

Sediments/General

• Ellwood, B.B. and Howard, J.F., III, 1981.  Magnetic fabric development in an experimentally produced barchan dune, Journal of Sedimentary Petrology, 51, 97-100.
• Ellwood, B.B., 1984.  Bioturbation:  Minimal effects on the magnetic fabric of natural and experimental sediments, Earth and Planetary Science Letters, 67, 367-376.
• Ellwood, B.B., 1984.  Reply to comment on "Bioturbation:  Minimal effects on the magnetic fabric of natural and experimental sediments", Earth and Planetary Science Letters, 71, 351-352.
• Ellwood, B.B., 1984.  Bioturbation:  Production of a post-depositional remanent magnetization in highly disturbed sediments, Geophysical Research Letters, 11, 653-655.
• Chernow, R.M., Frey, R.W. and Ellwood, B.B., 1986, Biogenic effects on development of magnetic fabrics in coastal Georgia sediments, Journal of Sedimentary Petrology, 56, 160-172.
• Morrison, J. and Ellwood, B.B., 1986, Paleomagnetism of Silurian-Ordovician sediments from the Valley and Ridge Province, Northwest Georgia, Geophysical Research Letters, 13, 189-192.
• Schieber, J. and Ellwood, B.B., 1988, The coincidence between microscopic paleocurrent indicators and magnetic lineation in shales from the Precambrian Belt Basin, Journal of Sedimentary Petrology, 58, 830-835.
• Schieber, J. and Ellwood, B.B., 1993, Determination of basinwide paleocurrent patterns in a shale succession from anisotropy of magnetic susceptibility (AMS): a case study of the mid-Proterozoic Newland Formation, Montana, Journal of Sedimentary Petrology, 63, 874-880.

Sediments/Marine

• Ellwood, B.B., 1979.  Particle flocculation:  one possible control on the magnetization of deep-sea sediments, Geophysical Research Letters, 6, 237-240.
• Ellwood, B.B., 1979. Sample shape and magnetic grain sizes: Two possible controls on the anisotropy of magnetic susceptibility variability in deep-sea sediments, Earth and Planetary Science Letters, 43, 309-314.
• Sachs, S.D. and Ellwood, B.B., 1988, Controls on magnetic grain-size variations and concentrations in the Argentine Basin, South Atlantic Ocean, Deep Sea Research, 35, 929-942.
• Ellwood, B.B., 1993, Magnetic properties of Argentine Basin Project MUDWAVE samples, Deep Sea Research, 40, 921-937.

Sediments/Paleoceanography

• Ellwood, B.B. and Ledbetter, M.T., 1977. Antarctic Bottom Water fluctuation in the Vema Channel: effects of velocity changes on particle alignment and size, Earth and Planetary Science Letters, 35, 189-198.
• Ellwood, B.B., Ledbetter, M.T., and Johnson, D.A., 1979.  Sedimentary fabric: a tool to delineate a high-velocity zone within a deep western Indian Ocean bottom current, Marine Geology, 33, M51-M55.
• Ellwood, B.B., 1980.  Application of the anisotropy of magnetic susceptibility method as an indicator of bottom-water flow direction, Marine Geology, 34, 783-790.
• Ellwood, B.B., 1980.  Induced and remanent properties of marine sediments as indicator of depositional processes, Marine Geology, 38, 233-244.
• Ledbetter, M.T. and Ellwood, B.B., 1980.  Spatial and temporal changes in bottom water velocity from analysis of particle size and alignment in deep-sea sediment, Marine Geology, 38, 245-261.
• Bulfinch, D.L., Ledbetter, M.T., Ellwood, B.B. and Balsam, W.L., 1982.  The high velocity core of the Western Boundary Undercurrent at the base of the U.S. Continental Rise, Science, 215, 970-973.
• Ellwood, B.B., 1984.  Magnetic fabric and remanence analyses of cores from the U.S. Continental Rise and the Vema Channel, Marine Geology, 58, 151-164.
• Balsam, W., Ellwood, B.B., and Ji, J., 2005, Direct correlation of the marine oxygen isotope record with Loess Plateau iron oxide and magnetic susceptibility records. Palaeogeography, Palaeoclimatology, Palaeoecology, 221, 141-152.
  

Stratigraphy/Correlation

• Ellwood, B.B., McPherson, J.G., Sen Gupta, B.K. and Matthews, M., 1986, The proposed Eocene-Oligocene stratotype, SW Alabama: Not ideal due to magnetostratigraphic inconsistencies, Palaios, 1, 417-419.
• Crick, R.E., Ellwood, B.B., El Hassani, A., Feist, R., and Hladil, J., 1997, MagnetoSusceptibility event and cyclostratigraphy (MSEC) of the Eifelian - Givetian GSSP and associated boundary sequences in North Africa and Europe, Episodes, 20, 167-175.
• Ellwood, B.B., Crick, R.E., and El Hassani, A., 1999.  The MagnetoSusceptibility Event and Cyclostratigraphy (MSEC) Method Used in Geological Correlation of Devonian Rocks from Anti-Atlas Morocco, AAPG Bulletin, 83, 1119-1134 (includes cover photo).
• Ellwood, B.B., Crick, R.E., El Hassani, A., Benoist, S. and Young, R., 2000. MagnetoSusceptibility Event and Cyclostratigraphy (MSEC) in Marine Rocks and the Question of Detrital Input Versus Carbonate Productivity, Geology, 28, 1135 - 1138.
• Crick, R.E., Ellwood, B.B., El Hassani, A, and Feist, R., 2000. Proposed Magnetostratigraphy Susceptibility Magnetostratotype for the Eifelian-Givetian GSSP (Anti-Atlas Morocco), Episodes, 23, 93-101.
• Ellwood, B.B., Crick, R.E., Garcia-Alcalde Fernandez, J.L., Soto, F.M., Truyols-Massoni, M., El Hassani, A., and Kovas, E.J., 2001. Global correlation using magnetic susceptibility data from Lower Devonian rocks, Geology, 29, 583-586.
• Crick, R.E., Ellwood, B.B., El Hassani, A., Hladil, J., Hrouda, F., and Chlupac, I., 2001.  Magnetostratigraphy Susceptibility of the Pridoli-Lochkovian (Silurian-Devonian) GSSP (Klonk, Czech Republic) and a Coeval sequence in Anti-Atlas Morocco, Palaeogeography, Palaeoclimatology, Palaeoecology, 167, 73-100.
• Crick, R.E., Ellwood, B.B., Feist, R., El Hassani, A., Schindler, E., Dreesen, R., Over, D.J., and Girard, C., 2002, Magnetostratigraphy susceptibility of the Frasnian/Famennian boundary. Palaeogeography, Palaeoclimatology, Palaeoecology, 181, 67-90.
• Thoa, N. T. K., Ellwood, B.B., Ngan, P.K., Nam, V.H., and Lan, L. T. P., 2002, Determination of the Devonian-Carboniferous boundary in limestone formations from Cat Ba and Nui Voi using the MSEC Method, Journal of Sciences of the Earth (paper written in Vietnamese with an English abstract), 24, 56-66.
• Ellwood, B.B., MacDonald, W.D., Wheeler, C., and Benoist, S.L., 2003. The K-T Boundary in Oman: Identified Using Magnetic Susceptibility Field Measurements with Geochemical Confirmation. Earth Planetary Science Letters, 206, 529-540.
• Ellwood, B.B., Benoist, S.L., El Hassani, A., Wheeler, C., and Crick, R.E., 2003. Impact Ejecta Layer from the Mid-Devonian: Possible Connection to Global Mass Extinctions. Science, 300, 1734-1737.
• Thoa, N.T. K, Huyen, D.T., Ellwood, B.B., Lan, L.T.P., and Truong, D.N., 2004,  Determination of Permian - Triassic boundary in limestone formations from Northeast of Vietnam by paleontological and MSEC methods, Journal of Sciences of the Earth (paper written in Vietnamese with an English abstract), 26, 222-232.
• Ellwood, B.B., Garcia-Alcalde, J.L., El Hassani, A., Hladil, J., Soto, F.M., Truyóls-Massoni, M., Weddige, K., and Koptikova, L., 2005. Stratigraphy of the Middle Devonian Boundary: Formal Definition of the Susceptibility Magnetostratotype in Germany with comparisons to Sections in the Czech Republic, Morocco and Spain, Tectonophysics, in press.
  

Statistics

• Huang, T.C., Ellwood, B.B., and Hanumara, R.C., 1974.  Multivariate discriminant analysis of Sub-antarctic deep-sea sediments, Bulletin of Geological Society of America, 84, 1821-1824.
• Vella, P., Ellwood, B.B., and Watkins, N.D., 1975.  Surface water temperature changes in the southern ocean southwest of Australia during the last one million years, Special Bull. Roy. Soc. N.Z., Quaternary studies: A selection of papers presented at the IX INQUA congress, New Zealand, 1973, 13, 197-209.

Video Programs

• Pratt, C. and Ellwood, B.B., 1988.  Applied Geoarcheology, aired 1989, PBS Channel 2, Dallas-Fort Worth metropolitan area, UT Arlington Television, 20 minutes; invited and shown nationally and internationally; featured in National Park Service pamphlets.

Volcanic Rocks

• Ellwood, B.B., 1982. Estimates of flow direction for calc-alkaline welded tuffs and paleomagnetic data reliability from anisotropy of magnetic susceptibility measurements: central San Juan Mountains, southwest Colorado, Earth and Planetary Science Letters, 59, 303-314.
• Knight, M.D., Walker, G.P.L., Ellwood, B.B. and Diehl, J.F., 1986, Stratigraphy, paleomagnetism, and magnetic fabric of the Toba Tuffs: Constraints on the sources and eruptive styles, Journal of Geophysical Research, 91, 10,355-10,382.
• Wolff, J.A., Ellwood, B.B., and Sachs, S.D., 1989, Anisotropy of magnetic susceptibility (AMS) in welded tuffs:  Application to a welded-tuff dyke in the Tertiary Trans-Pecos Texas Volcanic Province, USA, Bulletin of Volcanology, 51, 299-310.
• Ellwood, B.B., Stormer, J.C., Jr., and Whitney, J.A., 1989, Fish Canyon Tuff, Colorado:  The problem of two magnetic polarities in a single tuff, Physics of the Earth and Planetary Interiors, 56, 329-336.
• Palmer, H.C., MacDonald, W.D., Gromme, CS and Ellwood, BB, 1996, Magnetic properties and emplacement of the Bishop tuff, California: Bulletin of Volcanology, v 58, no. 2-3, p. 101-116.

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