VITAE

L. Paul Knauth
01/29/07

EDUCATION

B.A. 1966 University of Chicago
Ph.D. 1973 California Institute of Technology
S. Epstein, Advisor

POSITIONS HELD

1982 - Present      Professor, Department of Geology, Arizona State University
1982-1986 Chairman, Department of Geology, Arizona State University
1981-1994 Director, Arizona State University Summer Field Camp
1979-82 Associate Professor, Department of Geology, Arizona State University
1977-79 Associate Professor, Department of Geology, Louisiana State University
1972-77 Assistant Professor, Department of Geology, Louisiana State University

COURSES TAUGHT
(Underlined courses taught regularly or more than once)

Arizona State University (1979 - present)
Introduction to Geology           General Geology     Seminar in Isotope Geochemistry of Sedimentary Rocks
Physical Geology                     Isotope Geochemistry         Advanced Geomorphology seminar
Sedimentology                        Geology Colloquium             Environmental Aqueous Geochemistry seminar
Advanced Field                       Geology Summer Field Camp     Seminar in Stable Isotope Geochemistry
Historical Geology                                 Geology of the Grand Canyon      Advanced Sedimentology
Co-Founder/Co-Director, ASU Summer Field Camp, 1980-1996
Astrobiology

Louisiana State University (1972-1979)
Introduction Physical Geology
Introduction Historical Geology
Mineralogy I
Mineralogy II
Physical Chemistry of Petrologic Systems
Isotope Geochemistry
Seminars in Isotope Geochemistry, Cherts, and Precambrian Sedimentation

THESIS AND DISSERTATIONS DIRECTED

Arizona State University
    Marshall Haimson, M.S.                    Ron Matheney, Ph.D.                                 Tracey Carpenter, M.S.
    Mark Feldman, M.S.                          Ray Kenny, Ph.D                                      Gerald Pollack, M.S.                             
    Mark Beeunas, M.S.                          Bryce Winter, Ph.D.                                   Steve Skotnicki, Ph.D.
    Joel Hennessy, M.S.                          Donna Benson, M.S.                                   Blair Lindford, M.S.
    Tracy Thorliefson, M.S.                    Karen Katrinak , M.S.                                  Kathleen McFadden, M.S.

  Jennifer Abrahams, M.S.                  Paul Clemens, M.S.                                        Angelina Bond, M.S. (current)
    Sarah Roberts, M.S.                          Mary Doppler, M.S.
    Bryce Winter, M.S.                          Katrien van der Hoeven, (w/Burt)M.S.
    Anthony Guerrea (w/Peacock)          Kerrie Neet, M.S.
    Courtney Brand, M.S.                       Merry Wilson Nowicki, M.S.

Louisiana State University
        John Klasik, Ph.D.
        Allen Ambuehl, M.S.
        Daphne Jones, M.S.

LABORATORIES CONSTRUCTED

(Hands-on, including most of the glassblowing, metal vacuum line fabrication, mass spectrometer reconstruction, and electronic wiring )

(1979-present) Stable Isotope Laboratory, Arizona State University: 4 Isotope Ratio Mass Spectrometers, ion chromatograph, 6 extraction lines.
(1972-1979) Stable Isotope Laboratory, Louisiana State University: Isotope Ratio Mass Spectrometer, 2 extraction lines.
 

EDITORIAL POSITIONS

Associate Editor, Bulletin of Geologic Society of America. 1994-2001.
Associate Editor, Journal of Sedimentary Petrology, 1989-1992.
Associate Editor, Geology, 1983-1984.

TEACHING AWARDS FROM ASU STUDENTS
(Thank  you,  students!)

FROM ASU GEOLOGY STUDENTS (Presented at Annual Banquet):

TEACHER OF THE YEAR (Also called "Outstanding Professor" or "Student Appreciation Award"):

1990,1994, 1995, 1997, 1998,

BEST FIELD TRIP

1999, 2000

FROM ASU STUDENTS AT LARGE:

2002  "Last Lecture"  (No, not an invitation to leave, but an honor to be 1 of 3 selected annually to present an evening lecture as if it were the last lecture you would ever give.  Mine was "What is Nature Doing?  Campfire Reflections on the History of Life in the Cosmos".  April 24, 2002. 

Leader For Geology Department Public Field Trips Outreach Program
    1989-present

1-4 public field trips each year including annual raft trip down Grand Canyon. Also, Death Valley, Superstition Mountains, Western Arizona, Mogollon Rim area, and Yosemite/High Sierras

Elected Administrative Positions

Dean's Faculty Advisory Council, College of Liberal Arts and Sciences, Arizona State University, 1987-1989; 2005-2007; Chair, 2007.

Invited Seminar Speaker (Partial List)

Lamont-Doherty Geological Observatory
Phillips Petroleum Company Research Center
Chevron Oil Field Research Company (3 times)
University of Texas
University of Oklahoma (3 times)
Scripps Institute of Oceanography (2 times)
San Diego State University
Pennzoil Exploration Research
ARCO Exploration and Production Research (2 times)
AMOCO Production Company Research Laboratory (3 times)
U.S. Geological Survey, Flagstaff
University of Alberta
Battelle Memorial Institute
University of New Mexico (2 times)
Pennsylvania State University (2 times)
University of Arizona (3 times)
NASA Ames Research Center seminar series
California Institute of Technology (3 times)
Tulane University
University of California at Santa Cruz
University of Nevada, Las Vegas (2 times)
University of North Dakota
University of Texas at El Paso
Northern Illinois University
University of Chicago
UCLA (2 times)
University of Illinois (Walgreen Lecture, 2 times)
New York Center for Studies on the Origin of Life (Rensselaer/SUNY Albany)  (see/hear it:  http://www.origins.rpi.edu/seminar.html   (10/23/00)
Lunar and Planetary Institute
University of California at Riverside (3 times)
Jet Propulsion Laboratory
Tellus World of Science, Edmonton, Alberta

Local: Arizona Hydrological Society (3 times)
Salt River Project Utility Company
U.S. Dept. Of Agriculture Water Conservation Lab
State of Arizona Dept. of Environmental Quality
Numerous talks to local citizen clubs and associations

PUBLICATIONS -Journals and book chapters
 

Journal Listing: Science (3), Nature (4), Geology (4), Journal of Geophysical Research (2), Earth and Planetary Science Letters (2), Geochimica et Cosmochimica Acta (6) Journal of Geology (1), Journal of Sedimentary Petrology (5), American Mineralogist (1), Journal of Hydrology (1), Bulletin of the Geological Society of America (4), Economic Geology (1), Applied Geochemistry (1), Chemical Geology (1), Precambrian Research (2), Reviews in Mineralogy (1), Geochemical Society Special Papers (1), Nuclear and Chemical Waste Management (1), Icarus (1), Paleogeography, Paleoclimatology, Paleoecology (1), EOS, other (4).

Knauth, L.P. and S. Epstein, 1975, Hydrogen and Oxygen Isotope Rations in Silica from the JOIDES Deep Sea Drilling Project: Earth and Planetary Science Letters 25 p. 1-10. (Reprinted in Benchmark Papers in Geology, Diagenesis of Deep-Sea Biogenic Sediments, G.J. Van der Lingen, ed., Dowden, Hutchison and Rose, Inc., 1977).
Knauth, L.P. and S. Epstein, 1976, Oxygen and Hydrogen isotope ratios in nodular and bedded cherts: Geochimica et Cosmochimica Acta 140, p. 1095-1108.
Lowe, D.R. and L.P. Knauth, 1977, Sedimentology of the Onverwacht Group (3.4 billion years),Transvaal, South Africa, and its Bearing on the Characteristics and Evolution of the Early Earth: Journal of Geology 85, p. 699-723.
Lowe, D.R. and L.P. Knauth, 1978, The oldest marine carbonate ooids reinterpreted as volcanic accretionary lapilli, Onverwacht Group, South Africa: Journal of Sedimentary Petrology 48, p. 709-722.
Knauth, L.P. and D.R. Lowe, 1978, Oxygen Isotope Geochemistry of Cherts from the Onverwacht Group (3.4 billion years), Transvaal, South Africa with Implications for
secular variations in the isotopic compositions of cherts: Earth and Planetary Science Letters 41, p. 209-222.
Jones, D.R. and L.P. Knauth, 1979, Oxygen isotopic and petrographic evidence relevant to the origin of the Arkansas Novaculite (Devonian-Mississippian) of Arkansas and Oklahoma: Journal of Sedimentary Petrology 49, p. 581-598.
Knauth, L.P., 1979, A model for the origin of Chert in Limestone: Geology 7, p. 274-277.
Lowe, D.R. and L.P. Knauth, 1979, Reply to discussion on the oldest marine carbonate ooids reinterprets as volcanic accretionary lapilli, Onverwacht Group, South Africa: Journal of Sedimentary Petrology 49, p. 581-598.
Knauth, L.P., M.B. Kumar and J.D. Martinez, 1980, Isotope Geochemistry of Water in Gulf Coast Salt Domes: Journal of Geophysical Research 89, p. 4863-4871.
Knauth, L.P. and M. B. Kumar, 1981, Trace Water Content in Louisiana Salt Domes: Science, 213, p. 1005-1007.
Knauth, L.P. and S. Epstein, 1982, Nature of water in authigenic silica: American Mineralogist: 67, p. 510-520.
Knauth, L.P. and M.B. Kumar, 1983, Oxygen and Hydrogen Isotopic Character of Brine Leaks in the Avery Island Salt Mine, South Louisiana, U.S.A., Journal of Hydrology 66, p. 343-350.
Haimson, M. and L.P. Knauth, 1983, Stepwise Fluorination, A new approach for the isotopic analysis of hydrous minerals, Geochimica et Cosmochimica Acta 47, p. 1589-1595.
Hennessy, J. and L.P. Knauth, 1985, Isotopic variation in dolomite concretions from the
Monterey Formation, California, Journal of Sed. Pet., v. 55, p. 120-130.
Beeunas, M. and L.P. Knauth, 1985, Preserved stable isotopic signature of subariel diagenesis in the 1.2 B.Y, Mescal Limestone, Central Arizona: Implications for the timing and development of a vegetative land cover. Bull. Geol. Soc. Amer. 96, p. 737-745.
Force, E.R., B. Back, E.C. Spiker, and L.P. Knauth, 1986, A ground-water mixing model for the origin of the Imini manganese deposit (Cretaceous) of Morocco, Econ. Geol, 81, p. 65-79.
Knauth, L.P. and M. Beeunas, 1986, Isotope Geochemistry of fluid inclusions in Permian Halite with implications for the isotopic history of ocean water and the origin of saline formation waters. Geochimica et Cosmochimica Acta 50, p. 419-433.
Knauth, L.P. and M. Beeunas, 1987, Preserved stable isotope signature of subariel diagenesis in the Mescal Limestone, Central Arizona: Reply to a discussion by Vahrenkamp and Rossinsky. Bull. Geol. Soc. Amer., v. 99, p. 596-597.
Knauth, L.P., 1988, Origin and Mixing History of Brines: Palo Duro Basin, U.S.A., Journal of Applied Geochemistry, v. 3, p. 455-474.
Werner, M.L., M. Feldman, and L.P. Knauth, 1988, Petrography and Geochemistry of Richton Dome, MS., Carock, Chemical Geology, v. 74, p. 113-135.
Tesoriero, A.J. and L.P. Knauth, 1988, The Distribution of Trace Water Around Brine Leaks in the Avery Island Salt Mine: Implications for the Natural Migration of Water Salt, Nuclear and Chemical Waste Management; Radioactive Waste Management; v. 8, p. 189-197.
Matheney, R.K. and L.P. Knauth, 1989, Investigation of Oxygen Isotope Fractionation between Marine Bigenic Silica and Seawater, Geochiica et Cosmochimica Acta 53, p. 3207-3214.
Knauth, L.P. and S.K. Roberts, 1991, The Hydrogen and Oxygen Isotopic history of the Silurian-Permian hydrosphere as determined by direct measurement of Fossil Water. Geochemical Society Special Publication No. 3, p. 91-104.
Winter, B.L. and L.P. Knauth, 1992, Isotope Geochemistry of Carbonate Fracture Fills in the Monterey Formation, Calif. Journal of Sedimentary Petrology, 62, p. 208-219.
Winter, B.L. and L.P. Knauth, 1992, Isotope Geochemistry of Early Proterozoic Carbonate Concentrations in the Animikie Group of the Lake Superior Region: Evidence for anaerobic bacterial processes. Precambrian Research 54, p. 131-151.
Kenny, Ray and L.P. Knauth, 1992, Continental Paleoclimates from  dD and d¹⁸O  of Secondary Silica in Paleokarst Chert lags. Geology, v. 20, p. 219-222.
Knauth, L.P., 1992, Origin and diagenesis of cherts: An isotopic perspective in isotopic signatures and sedimentary records, N. Clauer and S. Chaudhuri (Eds.): Lecture Notes in Earth Sciences #43, Springer-Verlag, p. 123-152.
Winter, Bryce and L.P. Knauth, 1992, Stable isotope geochemistry of cherts and carbonates from the 2.0 Ga Gunflint Iron Formation: Implications for the depositional setting and the effects of diagenesis and metamorphism, Precambrian Research, v. 59, p. 283-313.
Knauth, L.P., 1993, Ancient Sea Water. (News and Views), Nature, v. 362, p. 290-291.
Hovorka, Susan D., L.P. Knauth, R. Stephen Fisher, and Guoqiu Gao, 1993, Marine to Non-Marine facies transition in Permian Evaporites of the Palo Duro Basin, Texas; Geochemical Response. Bull. Geol. Soc. Amer. 105, p. 1119-1134.
Matheney, R.K. and L.P. Knauth, 1993, New isotopic temperature estimates for early silica diagenesis, Geology 21, p. 519-522.
Horodyski, R.J. and L.P. Knauth, 1994, Life on Land in the Precambrian, Science, 263, p. 494-498.
Knauth, L.P. 1994 Petrogenesis of Cherts; in Reviews in Mineralogy, Vol. 29, Silica: Physical Behavior, Geochemistry, and Materials Applications, P.J. Heaney, C.T. Prewitt, G.V. Gibbs, Eds. Mineralogical Soc. Amer. 233-258.
Knauth, L.P. 1994, Life on land in the Precambrian - The Arizona connection; in Fossils of Arizona, Vol. II, D.Boaz, M. Dornan, S. Bolander, Eds. Mesa SouthWest Museum, Mesa Arizona, ISBN 0-935810-55-2, pp. 23-32.
Guerrera, A., Peacock, S., and Knauth, L.P. (1997) Large 18O and 13C depletions in greenschist facies carbonate rocks, western Arizona, Geology, 25, 943-946.
Knauth, L.P. (1998) Salinity history of the Earth's early ocean, Nature, 395, 554-555.
Eastoe, C.J., Long, A., and L.P. Knauth (1999) Stable chlorine isotopes in the Palo Duro Basin, Texas: Evidence for preservation of Permian evaporite brines. Geochim. Cosmochim. Acta, v.63, 1375-1382.
Knauth, L.P., Klonowski, S., Burt, D (2000) Ideas about the surface runoff features on Mars (letter). Science, 290, 711-712.
Kenny, R. and L.P. Knauth (2001) Stable isotope variations in the Neoproterozoic Beck Spring and Mesoproterozoic Mescal paleokarst: Implications for life on land in the Precambrian.  Bulletin Geologic Society of America, 113, 650-658.
Knauth, L.P. and Burt, D.M. (2002) Eutectic brines on Mars: Origin and possible relation to young seepage features. (Icarus, v. 158, 267-271).
Knauth, L.P. (2003) Siliceous Sediments.  Encyclopedia of Sediments and sedimentary rocks. G.V. Middleton, Ed. Kluwer Academic Publishers. Boston. Pp. 660-665.
Burt, D.R. and Knauth, L.P. (2003) Electrically conducting, Ca-Rich Brines, rather than water, expected in the Martian Subsurface. Journal of Geophysical Research, 108 (E4) 8026, doi:10.1029/2002JE001862, 2003.
Knauth, L.P. and D.R. Lowe (2003)  Archean climatic temperature inferred from oxygen isotope geochemistry of cherts in the 3.5 Ga Swaziland Supergroup, South Africa.  Geological Society of America Bulletin. 115, 566-580.
Knauth, L.P., Brilli, M., and Klonowski, S. (2003)  Isotope geochemistry of caliche on basalt. Geochimica et Cosmochimica Acta, 67, 185-195. (Selected for inclusion in Virtual Journal of Geobiology, http://earth.elsevier.com/geobiology)
Knauth, L.P. (2005)  Temperature and salinity history of the Precambrian ocean:  Implications for the course of microbial evolution.  Paleogeography, Paleoclimatology, Paleoecology, 219, 53-69.
Knauth, L.P., Burt, D.M., and Wohletz, K.H. (2005) Impact origin of sediments at the Opportunity landing site on Mars.  Nature, 438, 1123-1128.
Burt,D.M., Wohletz, K.H., and Knauth, L.P. (2006) Mars and Mine Dumps.  EOS, Transactions, American geophysical Union, 87, no. 49, 549-552.
Knauth, L.P. (2006) Signature Required. Nature (News and Views), 442, 873-874.

 

TECHNICAL REPORTS 

Knauth, L.P. (1979) Isotopic Studies of Waters in Salt Mines, in an investigation of the utility of Gulf Coast salt domes for the storage or disposal of radioactive wastes, J.D. Martinez, ed., p. 197-219, LSU Institute for Environmental Studies E511-02511-A-1.
Knauth, L.P. (1980) Trace Water Analysis of Salt and Isotopic Studies, in Report of the LSU Institute for Environmental Studies, E511-02500-Q-4, p. 20-27.
Knauth, L.P. and M. Beeunas (1985) Origin of fluid inclusion water in bedded salt deposits,
Palo Duro Basin, Texas, Office of Nuclear Waste Isolation Technical Report #569, Battelle Memorial Institute, 60 p
Knauth, L.P. (1981) Light Element Isotopic Geochemical Analysis, Technical Report, ONWI-9(81-4), p. 90-92, Battelle Memorial Institute,Columbus, Ohio.
Knauth, L.P. (1982) Light Element Isotopic Geochemical Analysis, 1982, Technical
Report, 1982, ONWI-9(83-3), p. 72-74, Battelle Memorial Institute, Columbus, Ohio.
Knauth, L.P. (1982) Light Element Isotopic Geochemical Analysis, 1982, Technical
Report, ONWI-9(82-4), p. 80-82, Battelle Memorial Institute, Columbus, Ohio.
Knauth, L.P. (1982) Light Element Isotopic Geochemical Analysis, 1982, Technical
Report, ONWI-9(83-1), p. 47.49, Battelle Memorial Institute, Columbus, Ohio.
Kreitler, C.W., J.B. Chapman, and L.P. Knauth (1984) Chemical and isotopic composition of
waters from the Salina Ometepec. Baja California, Texas Bureau of Economic Geology, OF-WTWI-1984-41, 30 p.
Knauth, L.P. (1985) ASU testing of water in salt, Proceedings of Salt Respiratory Projects'
Workshop on Brine Migration, ONWI Technical Report, Battelle Memorial Institute; P.C.910, C.101.
Knauth, L.P. (1987) Stable isotope constraints on the origin of brine in the Weeks Island
Strategic Petroleum Reserve. 24 pp. For U.S. Dept. Energy Strategic Petroleum Reserve.
Knauth, L.P. (1989) Stable isotope constraints on the origin of brine in the Weeks Island
Strategic Petroleum Reserve. Update following analyses of samples taken in 1989, 16 pp., For U.S. Dept. Energy Strategic Petroleum Reserve.
Knauth , L.P. (1990) Stable isotope constraints on the origin of brine in the Weeks Island
Strategic Petroleum Reserve; Update following analyses of samples taken in 1990, 9 pp., For U.S. Dept. Energy Strategic Petroleum Reserve.
Knauth, L.P. (1993) Stable isotope studies at the Coronado Generating Station, 22 pp., For Salt River Project, Phoenix, AZ.
Knauth, L.P. and Greenbie, M. (1997) Stable isotope investigation of Ground water-Surface water interactions in the Verde River Headwaters Area. Report for Arizona Groundwater Protection Fund, award #95-001. 52 pp + appendices.
Knauth, L.P. and Tracey Carpenter (2000) Stable isotope investigation of Salt River Project Ground Water Recharge Facility, 17pp., For Salt River Project, Phoenix, AZ.

THESIS AND DISSERTATION TITLES

AT ARIZONA STATE UNIVERSITY (1979-present):

MS:
Haimson, Marshall, 1982, "Oxygen Isotope Studies of Silica in the Monterey Formation, California", 77 p.
Hennessy, Joel, 1983, "Isotopic Variation in Dolomite Concretions from the Monterey Formation, California", 50 p.
Beeunas, Mark Anthony, 1984, "Preserved Stable Isotopic Signature of Subaerial Diagenesis in the 1.2 b.y. Mescal Limestone, Central Arizona: Implications for the Timing and Development of a Terrestrial Plant Cover", 91 p.
Feldman, Mark David, 1984, "Hydrogen Isotope Geochemistry of Trace Water in Sedimentary Dolomite", 64 p.
Thorleifson, James Tracy, 1984, "A Modified Stepwise Fluorination Procedure for the Oxygen Isotopic Analysis of Hydrous Silica", 71 p.
Tesoriero, Anthony John, 1985, "Distribution of trace water around brine leaks in the Avery Island Salt mine: Implications for natural migration of water in salt. 102 p.
Abrahams, Jennifer Anne, 1986, "Isotopic Investigation of Coastal Paleozoic Carbonate Diagenesis Adjacent to Crystalline Rock Highlands", 92 p.
Katrinak, Karen Ann, 1987, "Stable Isotope Studies of Cherts From the Archean Swaziland Supergroup of South Africa:", 100 p.
Winter, Bryce, 1987, "Isotopic Investigation of Carbonate Fracture fills in the Monterey Formation, California", 141 p.
Neet, Kerrie Elise, 1988, "A Stable Isotopic Investigation of the Mazatzal Peak Quartzite: Implications for Source Terranes", 109 p
Roberts, Sarah Kealy, 1990, "Stable Isotope Systematics of Dolomite Concretions and Beds from the Miocene Monterey Formation, California", 68 p.
Brand, Courtney 1995, " Evolution Of Surface Water In Central And Southern Arizona, Using Hydrogen And Oxygen Isotopic Analysis". 126p.
Guerrera Jr., Antonio 1996, "Stable Isotope Variations During Progressive Metamorphism and Deformation of the Kaibab and Martin Formations". 104 p. (co-advisor: S. Peacock).
Clemens, Paul Leslie 1996, "A modified procedure for the oxygen isotopic analysis of water and brines" 65 P (Department of Chemistry) MS
Benson, Donna 1996, "The Effect Of Stratigraphic Unconformities On The Development Of Fractures In Layered Sedimentary Rocks". 83 p.
Knadel, Gwen 1997, "A Stable Isotope Study Of The Secondary Silica Of The Superstition Mountains Of Central Arizona". 59p.
Doppler, Mary 1998, "Diagenetic features of chert as a guide to sourcing chert artifacts of the east-central Mogollon rim Region of Arizona. 86p.
Van der Hoeven, Kaatje, 1999 "Proterozoic chrysotile skarn deposits in the salt River Canyon, Arizona" (co-advisor: D. Burt).
Nowicki, Meredith J., 2000, "d13C and d18O variations in the Thunder Springs Member of the Redwall Limestone, Arizona" 52 p.
Carpenter, Tracey, 2001, "The origin of isotopically anomalous waters of the Mogollon Rim Region of Arizona", 107p.
Pollack, Gerald, 2001, The origin of secondary silica in volcanic rocks, Superstition Mountains, Arizona, 55p.
Lindford, Blair, 2001, Isotope chemostratigraphy of the Beck Spring Dolomite, Southeastern California.
McFadden, Kathleen, 2004, End-Permian Karst Stratigraphy and geochemistry at the Kaibab-MoenKoopi contact and its relationship to the Permian-Triassic boundary for Northern Arizona, 94p.

PhD:

Matheney, Ronald Kenneth, 1989, "Oxygen Isotopic Investigations in Stepwise Fluorination of Hydrous Silica And Other Geologic Materials", 136 p.
Kenny, Ray, 1991, "Stable Isotopes on Chert and Carbonate from Continental, and Lowland Subaerial Exposure Surfaces: southwestern U.S.", 204 p.
Winter, Bryce L., 1991, "Stable Isotope Geochemistry of Early Proterozoic Sedimentary Rocks in the Lake Superior Region, North America", 193 p.
Skotnicki, Steven J., 2001, "Timing of silicification of the Middle Proterozoic Mescal Paleokarst and the transition from the Mescal to Troy Quartzite, Central Arizona, 293 p.+map.

AT LOUISIANA STATE UNIVERSITY (1972-1979):

PhD:
Klasik, John Arthur 1976 "The silicification of Eocene Deep-Sea Sediments in the Atlantic Ocean" 201 p.
MS:
Jones, Daphne L. 1978 "Oxygen isotopic and petrographic evidence relevant to the origin of the Arkansas Novaculite (Devonian-Mississippian) of Arkansas and Oklahoma" 90 p.
Ambuehl, Alan Wayne 1979 "Surficial Tertiary authigenic silica of the Gulf Coastal Plain" 177p.

PUBLISHED ABSTRACTS 

Knauth, L.P. and S. Epstein (1971) Oxygen and hydrogen isotope relationships in cherts and implications regarding the isotopic history of the hydrosphere, Geol. Soc. America Abstracts with Programs 3(7), p. 624
Knauth, L.P. and S. Epstein (1973) Hydrogen and oxygen isotope ratios in cherts from theJOIDES Deep Sea Drilling Project, Geol. Soc. America Abstracts with Programs 5(7), p.694.
Knauth, L.P. and S. Epstein (1973) Implications of the isotopic composition of cherts for the
climatic temperature history of the Earth, Geol. Soc. America Abstracts with Programs
5(7), p. 695.
Jendrzejewski, J. and L.P. Knauth (1973) SEM observations of quartz in cherts: etched vs.
unetched surfaces, Abstract in Proc. Electron Microscopy Soc. America, 31st Annual
Meeting.
Knauth, L.P. (1974) Relationship of the isotopic composition f cherts to the depositional
environments of carbonates, Geol. Soc. America Abstracts with Programs 6(7), p. 828.
Lowe, D.R. and L.P. Knauth (1976) Sedimentology of the cherts of the Overnwacht Group (3.4. B.Y.), South Africa, Geol. Soc. America Abstracts with Programs 8(6), p. 987.
Jones, D.R. and L.P. Knauth (1978) Oxygen isotopic evidence relevant to the origin of the
Arkansas Novaculite, Geol, Soc. America Abstracts with Programs 10(7), p. 430.
Knauth, L.P. and D.R. Lowe (1978) Oxygen isotopic compositions of cherts from the
Onverwacht Group (3.4. B.Y.), South Africa, Geol, Soc. America Abstracts with Programs 10(7), p. 436.
Knauth, L.P. and C.H. Moore (1979) Isotope Geochemistry of subsurface Jurassic Smackover carbonates, 1979, Geol. Soc. America Abstracts with Programs.
Lowe, D.R. and L.P. Knauth (1979) Petrology of archean carbonate rocks in the Overnwacht
and Fig Tree Groups, South Africa, Geological Association of Canada. Program with
Abstracts 4, p. 64.
Knauth, L.P. and M.B. Kumar (1980) Trace water content of Gulf Coast Salt Domes, Geol. Soc. America Abstracts with Programs.
Sykes, M.L., G.H. Heiken, J.R. Smyth, and L.P. Knauth (1980) Zeolites in silicic tuffs of the
Nevada test site 1980. Geol. Soc. America Abstracts with Programs.
Knauth, L.P. (1982) The Origin of Water in Salt, Geol. Soc. America Abstracts with Programs, v. 14, No. 7, p. 532.
Knauth, L.P. (1982) Isotopic Analysis of Upper Proterozoic Cherts with Possible Implications
for Upper Precambrian Climates and the Phanerozoic Explosion of Life. Geol. Soc.
America Abstracts with Programs, v. 14, No. 7, p. 532.
Haimson, M. and L.P. Knauth (1982) Stepwise Flourination-A New Approach for Isotopic
Analysis of Hydrous Minerals. Geol. Soc. America Abstrcts with Programs, v. 14, No. 7,
p. 505.
Beeunas, M. and L.P. Knauth (1982) Preserved Stable Isotopic Signature of Subariel diagenesis in the 1-2 B.Y. Mescal Limestone of Central Arizona. Geol. Soc. America Abstracts with Programs, v. 14, No. 7, p. 44.
Hennessy, J. and L.P. Knauth (1983) Isotopic Variation in Dolomite Concretions from the
Monterey Formation of California, Geol. Soc. America Abstracts with Programs, v. 15, No. 6, p. 595.
Beeunas, M. and L.P. Knauth (1983) Isotopic Composition of Fluid Inclusion in Permian Halite-Implications for the Isotopic History of Sea Water, Geol. Soc. America Abstracts with Programs, v. 15, No. 6., p. 524.
Knauth, L.P. and N. Hubbard (1984) Isotope Geochemistry of Formation Waters in the Palo
Duro Basin, Texas, Geol. Soc. America Abstracts Program, v. 16, No. 6, p. 561.
Feldman, M. and L.P. Knauth (1984) Hydrogen Isotope Geochemistry of Trace Water in
Sedimentary Dolomite, Geol. Soc. America Abstracts with Programs, v. 16, No. 6, p. 507.
Thorliefson, T. and L.P. Knauth (1984) An Improved Stepwise Flourination Procedure the
Oxygen Isotopic Analysis of Hydrous Silica, Geol. Soc. America Abstracts with Programs, v. 16, No. 6, p. 675.
Knauth, L.P., S. Kealy, and S. Larimer (1985) Isotopic composition of Silurian sea water, Geol. Soc. America Abstract with Program, v. 17, No. 7, p. 630.
Beeunas, M. and L.P. Knauth (1986) Isotope Geochemistry of Fluid Inclusions in Permian
Halite with Implications for Isotopic History of Ocean Water, American Chemical Society
192nd National Meeting, Div. Geochemistry Abstracts #24.
Knauth, L.P. (1986) Stable isotope variations of deep basins brines reexamined, Geol. Soc.
America Abstracts with Programs, v. 18, No. 6, p. 659.
Knauth, L.P., S. Hovorka and R.S. Fisher (1986) Isotope Geochemistry of Fluid Inclusions in
relation to Sedimentology and bromide geochemistry of halite in the Palo Duro Basin,
Texas, American Current Research on Fluid Inclusions, Programs and Abstracts, Inaugural vol., New Mexico Institute of Mining and Technology, Socorro, New Mexico.
Werner, M.L., M. Feldman, and L.P. Knauth (1987) Petrography and geochemistry of calcite
caprock at Richton Dome, Miss: a model for dark/light layering, Soc. Econ.
Paleontologists and Mineralogists, Midyear Meeting, IV, p. 91.
Werner, M.L., M. Feldman, and L.P. Knauth (1987) Petrography, structure and geochemistry of gypsum veins in Richton Dome Caprock, Miss: Evidence for incomplete hydration, Soc. Econ. Paleontologists and Mineralogists, Midyear Meeting, IV, p. 91.
Feldman, M. and L.P. Knauth (1987) Paleoatmospheric Gases in brine inclusions in halite, Geol. Soc. America Abstracts with Programs, v. 19, No. 7, p. 661.
McHone, J.F. and L.P. Knauth (1988) Barringer Crater Stishovite: Oxygen-18 rich relative to
bulk target rock: Lunar Science XIX, p. 756-757, Lunar and Planetary Science Institute,
Houston, Tx.
Katrinak, K. and L.P. Knauth (1988) Oxygen and hydrogen isotope ratios in Archean Cherts as indicators of climatic temperature, American Geophysical Union, EOS, 69, p. 1514.
Matheney, R. and L.P. Knauth (1988) Investigation of oxygen isotope equilibrium in marine
biogenic silica, 1988, Am. Geophy. Union, EOS 69, p. 1514.
Winter, B. and L.P. Knauth (1989) Isotopic investigation of carbonate fracture fills in the
Monterey Formation, Califormia, 1989, Geol. Soc. America, Abstracts with Programs, v.
21, No. 5, p. 160.
Neet, K.E. and L.P. Knauth (1989) The oxygen isotopic composition of the Mazatzal Peak
Quartzite: implications for source terranes, Geol. Soc. America, Abstracts with Programs, v. 21, No. 5, p. 121.
Roberts, S. and L.P. Knauth (1989) Stable isotope systematics of dolomite concretions and beds from the Miocene Monterey Formation, California, Geol. Soc. America, Abstracts with Programs, 1989 Annual Meeting, p. A17.
Feldman, M. and L.P. Knauth (1989) The oxygen content of the Permian atmosphere: results from direct measurement of paleoatmospheric gasses dissolved in brine inclusion in halite, Geol. Soc. America, Abstracts with Programs Annual Meeting, p. A138.
Winter, B. and L,P, Knauth (1989) Isotopic investigation of early Proterozoic carbonate
concretions from the Animikie Group of th eLake Superior Region: Evidence for
anaerobic bacterial process, Geol. Soc. America, Abstracts with Programs 1989 Annual
Meeting, p. A138.
Knauth, L.P. (1989) Climatic Temperature history of the earth as deduced from secular
variations in the 180O/16O ratios of cherts. The Sun in Time, Univ. of Arizona Research Conference; March 06-10, 1989.
Knauth, L.P. (1989) The hydrogen and oxygen isotopic history of the hydrosphere for the last 400 million years as determined by direct measurement of fossil water, Extended abstract for the Epstein Symposium, Div. Geological and Planetary Science, Calif. Inst. Of Technology, Dec. 1989.
Winter, B. and L.P. Knauth (1989) Oxygen, hydrogen and carbon isotope study of the
Proterozoic pillow basalt in the Cornucopia Member of the Alder Senes, Central Mazatzal Mountains, Arizona, Geol. Soc. America Abstracts with Programs, v. 22, No. 3, p. 94.
Kenny, R., L.P. Knauth and R.J. Hordyski (1990) Isotopic, field and micropaleontologic study
of the Proterozoic Beck Spring (CA.) and Mescal (AZ.) Formations: Evidence for
Precambrial terrestrial photosynthetic communities. Geol. Soc. America Abstracts with
Programs, v. 22, No. 7, p. A191.
Winter, B.L. and L.P. Knauth (1990) Isotopic constraints on the origin of the Gunflint Cherts.
Geol. Soc. America Abstracts with Programs, v. 22, No. 7, p. A263.
Knauth, L.P. and S.K. Roberts (1990) Use of stable isotopes and chemical analyses to determine brine sources in salt domes: Progress and problems. Geol. Soc. America Abstracts with Programs, v. 22, No. 7, p. A247.
Winter, B.L. and L.P. Knauth (1990) Carbon and oxygen constraints on the origin of carbonate in the ~2.0 GA Gunflint Iron-Formation, Ontario, Canada, EOS 4, 71, No. 43, p. 1717.
Matheney, R.J. and L.P. Knauth (1992) Reduced oxygen-isotope temperature estimates for the Opal -A/Opal-CT Transition, Monterey Fm., California, American Geophysical Union EOS, v. 73, No. 14, p. 143.
Knauth, L.P. and R.J. Horodyski (1992) Life on Land in the Precambrian, Geol. Soc. America Abstracts with Programs, v. 24, p. A-99.
Shirley, D.H. and L.P. Knauth (1992) The use of stable isotopes to characterize groundwater and interpret contaminated water sources. Arizona Hydrological Society Ann. Symposium, Sedona, Arizona, 1992.
Knauth, L.P. and R.J. Horodyski (1993) Evidence for and implications of life on land in the
Proterozoic, Geol. Soc. America Abstracts with Programs, v. 25, No. 6, p. A-80.
Knauth, L.P. and Dennis Shirley (1993) Use of stable isotopes to evaluate the impact of plant operations on ground water quality at a major power generating facility. Geol. Soc. America Abstracts with Programs, v. 25, No. 6, p. A-80.
Knauth, L.P. (1994) Paleokarst: A window of life on land in the Precambrian. Karst Waters
Institute Special Pub. No. 1, Breakthroughs in Karst Geomicrobiology and Redox
Geochemistry, I.D. Sasowsky and M.V. Palmer, Eds., p. 42-43.
Knauth, L.P. and Clemens, P.L. (1995) Climatic temperature history of the Earth based on isotopic analyses of cherts. Geological Society of America Abstracts with Programs 27,6 p. 205.
Brand, C.C. and L.P. Knauth (1995) Stable isotopic evolution of watersheds with implications for the origin of "local meteoric water lines". Geological Society of America Abstracts with Programs 27, 6, p. 38.
Runnegar, B., Gehling, J.G., Horodyski, R.J., Jensen, S., and L.P. Knauth (1995) Base of the Sauk Sequence is a global eustatic event that lies just above the Precambrian-Cambrian boundary. Geological Society of America Abstracts with Programs v. 27, no. 6, p. 330.
Knadel, G. and L.P. Knauth (1996) Origin of secondary quartz in a silicic volcanic complex; implications of O and H isotope data for hydrothermal deposition versus low temperature weathering. Geological Society of America Abstracts with Programs -. 28; 7, 161.
Guerrera, A., Knauth, L.P. and Peacock, S.M. (1996) Large 18O and 13C depletions in carbonates during low grade metamorphism; examples from western Arizona. Geological Society of America Abstracts with Programs 28; 7, Pages 422-423.
Knauth, LP (1998) Early evolution of life in non-marine environments, 6th symposium on chemical evolution and the origin and evolution of life, NASA Ames. Acevedo, S.E., DeVincenzie, D., and chang, S., eds. NASA /CP-1998-10156, p. 68-69.
Knauth, L.P (1998) Salinity, temperature, and oxygen history of the Precambrian Ocean. Geological Society of America Abstracts with Programs, Annual Mtg at Toronto, A-272.
Knauth, L.P. (1999) Oxygen isotopic analyses of diagenetic cherts and the climatic temperature history of the earth. 9th annual V.M. Goldschmidt Conference, Harvard University, Lunar and Planetary Institute Contribution No. 971, P. 155-156.
Knauth, L.P. (1999) Salinity history of seawater. 9th annual V.M. Goldschmidt Conference, Harvard University, Lunar and Planetary Institute Contribution No. 971, P. 156.
Knauth, L.P. (1999) Isotopic investigation of the source of the Verde river Headwaters with implications for their possible hydrologic connection with groundwater in the Chino Valleys. Arizona Hydrologic Society, 1999 Annual Symposium, Pinetop-Lakeside, September 9-11.
Van der Hoeven, K.J. Knauth, L.P.,and Burt, D. (1999) Extremely low-temperature magnesian skarns: chrysotile deposits of the Salt River Canyon area, Arizona.  Geological Society of America Abstracts with Programs A-161, Ann.Mtg. Denver.
Knauth, L.P. and Farmer, J. (1999) Biosignatures in calcite formed during the weathering of basalt. Geological Society of America Abstracts with Programs A-433, Annual Mtg, Denver.
P. Westerhoff, P. Knauth, P. Dahlen, and T. Carpenter (1999) Regional assessment of GRUSP and other recharge projects on groundwater quality: benefits of recharging into ephemeral channels, AWPCA Annual Conference, Tucson, AZ, May 5-7 (1999).
Knauth, L.P. (2000) Life on land in the Precambrian and the marine vs non-marine setting of early evolution. First Astrobiology Science conference, April 3-5, 2000, NASA Ames Research Center, 403.
Garvie, L.A.J., Bungartz, F.,  Nash III, T.H., and Knauth, L.P. (2000) Caliche dissolution and calcite biomineralization by the endolithic lichen Verrucaria rubrocincta Breuss in the Sonoran Desert. Goldschmidt 2000, Jour. Conf. Abstracts 5(2), 430.         Bungartz, F., Garvie, L.A.J., Nash III, T.H., and Knauth, L.P. (2000) Simultaneous mineral dissolution and biomineralization fo caliche by the endolithic lichen Verrucaria Rubrocincta Breuss in the Sonoran desert.  International Ass. Lichenology, IAL4 Conference, Barcelona.
Knauth, L.P., Burt, D.M. and Klonowski, S. (2000) Dense, eutectic, valley-forming, intermediate latitude (DEVIL) brines on Mars.  Geologic Society of America Abstracts with Programs A-303, Annual Mtg Reno.
Knauth, L.P. and D.R. Lowe (2001) Environmental conditions of the early Earth at the time of the earliest microfossil record. Second Astrobiology Science Conference, April 10-12, Carnegie Institution of Washington, Washington, DC. p. 242-243.
Knauth, L.P. and D.M. Burt (2001) "Follow the water, beware the brine": Astrobiological Implications of aqueous seeps on Mars. Second Atrobiology Science Conference, April 10-12, Carnegie Institution of Washington, Washington, DC.  p. 187-188.
Knauth, L.P. (2001) Isotopic biosignature in calcite formed during weathering of basalt: Implications for past life on Mars, early life on land, and ALH 84001. Second Astrobiology Science Conference, April 10-12, Carnegie Institution of Washington, Washington, DC. p. 185-186.
Skotnicki, S.J. and L.P.Knauth (2001) Timing of silicification of the Middle Proterozoic Mescal paleokarst and the transition from the Apache Group to the Troy Quartzite in Central Arizona. Geologic Society of America Abstracts with Programs v. 33, no.5, A-41, Mtg Albuquerque.
Knauth LP, Burt DM, and Tyburczy, JA, 2001, Highly conductive eutectic brines rather than water expected in the martian subsurface. In Conference on the Geophysical Detection of Subsurface Water on Mars, p. 60-61. LPI Contribution No. 1095, Lunar and Planetary Institute, Houston.
Knauth, L.P., 2001, Is hydrology of Mars the hydrology of brines? Arizona Hydrological Society Annual Symposium, Tucson, 11/12/01-11/15/01.
Knauth, L.P. 2001, Importance of brines and caliche in the search for past life on Mars.   EOS Trans. AGU, 82(47), Fall Meet. Suppl. Abstract P21C-05.
Bungartz, F. , L.A. Garvie, Nash, T.H., and L.P. Knauth. 2001, Biologicallly-Induced mineralization by the endolithic lichen Verrucaria Rubrocincta Breuss in the Sonoran Desert.  Eos Trans. AGU, 82(47), Fall Meet. Suppl., Abstract B32C-07.
Knauth, L.P. (2002) Early Oceans: Cradles of Life or Death Traps? Astrobiology Science Conference 2002, April 7-11, NASA Ames Research Center. p. 9.
Knauth, L.P. and Burt, D.M. (2004)  The “Brine Splat” Hypothesis for Features Observed at the Opportunity Landing Site. Lunar and Planetary Science Institute 2nd Conference on Early Mars, Jackson, Wyoming, #8047.
Burt, D.M. and Knauth, L.P. (2004) Brine splat interpretation of features seen at hte Opportunity landing site on Mars. Geological Society of America, Abstracts with Programs, Denver Meeting, 5-10.
McFadden, K.A. and Knauth. L.P. (2004) Geochemistry at the Kaibab-Moenkopi contact and its relationship to the Permian-Triassic boundary for Northern Arizona. Geological Society of America, Abstracts with Programs, Denver meeting,  103-13.
Burt, D.M., L.P. Knauth, K.M. Wohletz, (2005) Origin of layered rocks, salts, and spherules at the opportunity landing site on Mars: No flowing or standing water evident or required. Lunar and Planetary Science XXXVI, Abstract 1527.
Knauth, L.P. (2005) An alternative view of the course of evolution with implications for life elsewhere in the Universe.  The eighth NASA Exobiology Principal Investigator Symposium, NASA Ames Research Center.
Burt, D.M., Knauth, L.P., Wohletz, (2005) Impact derived sedimentary rocks: How common Mars? Geol. Soc. Amer. Annual mtg. Salt Lake City, Paper 233-10.
Knauth, L.P. and Kennedy, M. (2005) An alternative view of C isotope variations in Neoproterozoic carbonates. Geol. Soc. Amer. Annual mtg. Salt Lake City, Paper 16-11.
Knauth L.P., Burt, D.M., and Wohletz K.H. (2006) Impact surge as the simplest of the proposed hypotheses for the origin of sediments at the Opportunity Landing Site on Mars.  Lunar and Planetary Science XXXVII, #1869.
Burt, D.M., Knauth, L.P., Wohletz, K.H., and Sheridan, M.F.  (2006) History of surge deposit misidentification at Spor Mountain, Utah and elsewhere: A cautionary message for Mars: Volcanic Flows and Falls: A Conference to Honor Professor Michael F. Sheridan, Buffalo, NY, May 11-12 (Abstr. published on CD by SUNY-Buffalo).
Burt, D.M., Knauth, L.P. and Wohletz, K.H. (2006) Impact excavation of sulfides that then weather into sulfates: An astrobiology-friendly explanation for acid sulfate formation on Mars: Martian Sulfates as Recorders of Atmospheric-Fluid-Rock Interactions, Lunar and Planetary Institute, Houston, Abstr. #7004.
Burt, D.M., Knauth, L.P. and Wohletz, K.H. (2006) Impact dispersal and weathering of sulfides on early Mars: A source of acid sulfates and a possible habitat for microbes: Geol. Soc. Am., Abstracts with Programs, v. 38, no. 7, p. 308, Paper 123-8.
Knauth, L.P., Awramik, S.M., and Buchheim, H.P. (2006) Isotope geochemistry of 2.7 Ga chert and carbonate, Tumbiana Formation, Australia: Implications for late Archean climatic temperatures and early evolution of life.  Geol. Soc. Abstracts with Programs, v. 38, Paper 161-6.
Ohmoto, H. Watanabe, Y., Allwood, A.C., Burch, I.W.,Knauth, P., Yamaguchi, K.E., Johnson, I. (2006) Discovery of probable >3.43 Ga Paleolaterites in the Pilbara Craton, Western Australia, Eos Trans., AGU, 87(52), Fall Meet.Suppl., Abstract V24B-07.

GRANTS 

Grant Sources:     Federal:     National Science Foundation (12)
                                                Department of Energy (8)
                                                NASA (8)
                                                Department of Agriculture (1)
                            State:         Arizona Water Protection Fund (1)
                                                Universities (2)
                            Industry:       Amoco Oil (3)         Exxon Oil (1)
                                                  Chevron Oil (4)     ARCO Oil (1)
                                                  Shell Oil (2)
                                                  Salt River Utility Co. (2)
 

Participation in Special Scientific Meetings, Service on Working Groups (Partial list)

Invited speaker at Conference on Archean Granites, and Exogenic Processes. Mont. Ste. Marie, Quebec, 1977.
Invited speaker, Penrose Conference on Siliceous Deposits, Vancouver, British Colombia, 1978.
NASA Workshop on Early Evolution of the Earth's Crust, Houston, Texas 1980.
Invited speaker, SEPM Conference on 'Stable Isotopes in Sedimentological Research', Aspen, Colorado, 1981.
Invited speaker, SEPM Conference on 'Fluid Inclusions in Sedimentary Rock', Lost Valley Ranch, Colorado, 1984.
Invited speaker, American Chemical Society Symposium on origin and evolution of subsurface brines, Los Angeles, 1986.
Nuclear Waste Isolation Workshop on Isotope Hydrology, Tucson, Arizona, 1981.
Member International Geological Correlation Program (IGCP) Project No. 160: Precambrian Exogenic Processes.
Member, Surface Processes Working Group, NASA program on Early Evolution of the Earth'sCrust.
Member, International Geological Correlation Program (IGCP) Project No. 115: Siliceous Deposits in the Pacific Region.
Attended and gave invited presentation at NASA workshop on preservation of microorganisms in ancient salt deposits, Fairfax, Va., 8/19 - 8/21, 1994.
Taught 3-day Short Course on "Cherts and other forms of authigenic silica", ARCO Oil, 1984.
Speaker, Inaugural Meeting "American Current Research on Fluid Inclusion", Socorro, New Mexico, 1987.
Keynote Speaker, Penrose Conference on "Geochemistry of Oil Field Brines", Oxnard, California, 1987.
Speaker, Epstein Symposium, on Stable Isotope Geochemistry, California Institute of Technology, 1989.
Taught Short Course on Isotopic Hydrogeology, Salt River Project Utility Company, Phoenix,1981.
Speaker: Karst Waters Symposium: Breakthroughs in Karst Geomicrobiology and Redox Geochemistry, Colorado Springs, Colorado, 1994.
Review Panel for Department of Energy High-Level Nuclear Waste Repository Site Characterization Documents (Argonne National Labs, 1986-1994).
Member, Risk Abatement Panel; Department of Energy Strategic Petroleum Reserve, Weeks Island, LA, 1987.
Expert Witness before Texas Water commission regarding application of Hunter Industries to put toxic waste in Dayton Salt Dome, August 1992.
Review Panel member, NASA Exobiology Program 1997, 1998
Member, NASA Astrobiology Institute 1999-present
Invited speaker, Gordon Research Conference on "Origin of Life", 2000, Plymouth, New Hampshire
Invited speaker, Hudnall Symposium in Honor of Robert N. Clayton, June 7-8, 2001. University of Chicago. " Isotopic biosignature in calcite formed during weathering of basalt: implications for past life on Mars, early life on land, and ALH84001"
Plenary Speaker,  Second Atrobiology Science Conference, April 10-12, 2002, Carnegie Inst. of Washington, Washington, DC.
Plenary Speaker, Astrobiology Science Conference, April 7-11, 2002, NASA Ames Research Center.
Participant and speaker: NASA Astrobiology Institute Field Conference on Archean Surface Processes, 2003, Barberton, S. Africa.
Participant and speaker: NASA Astrobiology Institute Field Conference, (2005) Life in the Pilbara and the search for life on Mars, Perth, Western Australia.
Participant:  Pale Blue Dot III, Searching for life on distant worlds.  Adler Planetarium, Chicago, IL. Sept. 17-20, 2006