Franziska Landes
Personal Information
Franziska
Landes
Graduate Student
Earth and Environmental Sciences
Geochemistry
Contact Information
417 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8652

Fax: 

(845) 365-8155

Fields of interest: 

Environmental geochemistry, environmental health, soil science, citizen science, environmental education

Franziska Landes is a fifth year Ph.D. student in the Earth and Environmental Science program at Columbia University. She is interested in environmental geochemistry and public health, especialy the potential for community and public participation in science to reduce exposure to environmental contaminants while increasing our knowledge of environmental contaminants, public awareness of relevant health information, and improve science literacy. Her current work involves developing a field test kit for lead in soils and studying the impact of soil lead contamination in New York and Peru.

After receiving her BSc from Jacobs University in Germany, she worked for two years at the Oklahoma Department of Environmental Quality, conducting and reviewing environmental assessments and remediation plans for the Brownfields Program.

Education
MA in Earth and Environmental Science
Columbia University
05/2015
BSc Earth and Space Science
Jacobs University, Bremen, Germany
06/2011
Selected Publications:
Cadmium and Uranium in German and Brazilian Phosphorous Fertilizers, Smidt, G.A.; Landes, F.C.; Carvalho, L.M.; Koschinsky, A.; Schnug, E. The New Uranium Mining Boom, Berlin p.: 167-174 (2012)
Bridgit Boulahanis
Personal Information
Bridgit
Boulahanis
Graduate Student
Earth and Environmental Sciences
Marine Geology and Geophysics
Contact Information
Bridgit_Boulahanis2.jpg
303F Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8355

Fax: 

(845) 365-8156
Yen Joe Tan
Personal Information
Yen Joe
Tan
Graduate Student
Earth and Environmental Sciences
Marine Geology and Geophysics
Contact Information
303F Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8355

Fax: 

(845) 365-8156

Fields of interest: 

marine geophysics, seismology
Bärbel Hönisch
Personal Information
Bärbel
Hönisch
Associate Professor
Earth and Environmental Sciences
Geochemistry
Contact Information
229 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8828

Fax: 

(845) 365-8155

Fields of interest: 

Paleoclimatology, Paleoceanography, Biological Oceanography

My main interest is focussed on the understanding and reconstruction of past marine carbonate chemistry. Specifically, I seek to validate and apply the boron isotope proxy for past seawater pH. The methods used for the validation work are culture experiments with living planktic foraminifers, as well as observations on planktic and benthic foraminifers from coretop sediments, and now also bamboo corals. Specifically I studied the influence of symbiont photosynthesis on the pH recorded by planktic foraminifers (Hönisch et al., 2003) and scleractinian corals (Hönisch et al., 2004). The boron isotopic composition of symbiont-bearing planktic foraminifers also changes with foraminiferal shell size, as it appears that larger individuals spend relatively more time closer to the seasurface where light levels are higher and symbiont photosynthesis is stronger (Hönisch and Hemming, 2004). In the latter study we also describe a significant post-depositional dissolution effect on the boron isotopic composition in foraminifera shells. Although these side effects are significant, the detailed knowledge of these proxy limitations now allows us to carefully select sample material for paleoreconstructions. I am currently applying the boron isotope proxy to reconstruct ocean acidification across the Paleocene/Eocene Thermal Maximum.

The B/Ca proxy for marine carbonate chemistry is fairly new and we continue to test it in culture experiments Allen et al., 2011, Allen et al., 2012), where we can control environmental conditions. I am also particularly interested in testing proxy relationships of times when the minor and trace element composition of seawater was different from today.

Some of my projects include:

  • Testing Geochemical proxy relationships under variable paleo-seawater chemical conditions
  • Reconstructing surface ocean acidification at the PETM
  • Validating the boron isotope proxy in deep-sea corals and tracing anthropogenic CO2 invasion
Education
Ph.D.
Alfred Wegener Institute for Polar and Marine Research (AWI) and University of Bremen
2002
Diplom (equal to MS)
University of Bremen
1999
Vordiplom (equal to BA)
University of Bielefeld
1995
Caroline Baptist
Selected Publications:
The influence of salinity on Mg/Ca ratios of cultured and core-top planktic foraminifers, Hönisch, B., K.A. Allen, D.W. Lea, H.J. Spero, S.M. Eggins, J. Arbuszewski, P. deMenocal, Y. Rosenthal, A.D. Russell Geochimica et Cosmochimica Acta, Volume: 121 p.: 196-213 (2013) 10.1016/j.gca.2013.07.028
The Geological Record of Ocean Acidification, Hönisch, B.; A. Ridgwell; D.N. Schmidt; E. Thomas; S.J. Gibbs; A. Sluijs; R.E. Zeebe; L. Kump; R.C. Martindale; S.E. Greene; W. Kiessling; J. Ries; J. Zachos; D.L. Royer; S. Barker; T.M. Marchitto Jr.; R. Moyer; C. Pelejero; P. Ziveri; G.L. Foster; and B. Science, Volume: 335, Issue: 1058 (2012)
Atmospheric Carbon Dioxide Concentration over the Mid Pleistocene Transition, Hönisch, B.; Hemming, N.G.; Archer, D.; Siddall, M.; McManus, J.F. Science, Volume: 324 p.: 1551-1554 (2009)
Peter B. deMenocal
Personal Information
Peter
B.
deMenocal
Professor
Earth and Environmental Sciences
Biology and Paleo Environment
Contact Information
207 Geoscience
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8483

Fax: 

(845) 365-8150

Fields of interest: 

Paleoceanography and Paleoclimatology

I study marine sediment to reconstruct past changes in ocean circulation and terrestrial climate. Our group primarily uses stable isotopic and trace metal (Mg/Ca) analyses of foraminifera and terrigenous sediment geochemistry to investigate how and why climates have changed in the past. Recent research projects include: Holocene climate and ocean circulation variability

Some of my projects include:

  • African climate change and Human evolution ( details )
  • Holocene climate variability ( details )
  • Abrupt onset and termination of the African Humid Period ( details )
  • Cultural responses to Holocene climate changes ( details )
  • Mollusc geochemistry and reconstructing seasonal to multiannual records of coastal oceean temperatures ( details)

 

 

Education
Ph.D. (Geology)
Columbia University
1991
M.S. (Oceanography)
University of Rhode Island, Graduate School of Oceanography
1986
B.S. (Geology) cum laude
St. Lawrence University
1982
W. Roger Buck
Personal Information
W. Roger
Buck
Lamont Research Professor
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Adjunct Professor
Earth and Environmental Sciences
Associate Director-Marine Geology and Geophysics
Lamont-Doherty Earth Observatory
Contact Information
305B Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8592

Fax: 

(845) 365-8156

Fields of interest: 

Development of theoretical models for processes that affect the solid earth.

My research interests lie in developing theoretical models for processes that affect the solid earth. Recently, my students and I have been creating computer models of mantle upwelling in the region of melting below a mid-ocean ridge and investigating how it leads to the structural and topographic features we observe on ridges.

We are also trying to understand how and why extension of the earth's crust occurs in such a wide variety of ways. In particular, I am interested in the effect of a weak lower crust on patterns of deformation that occur at the surface. For example, a weak lower crust may allow active normal faulting in the core of a mountain belt while thrusting occurs in the outer parts of the belt. My interests extend to deformation patterns and topography on other planets such as Venus, which has a very different style of tectonics than is seen on earth.

I believe theorists need to get out and see where the data come from. In recent years I have been fortunate to participate in such diverse field work as collecting rocksamples for radiometric dating in Egypt and in the Mojave Desert, diving on the Reykjanes Mid-Ocean Ridge in a Russian submersible, and helping with GPS surveys on Iceland.

Education
Ph.D.
MIT
1984
Bachelor of Science
William & Mary
1978
Selected Publications:
How Much Magma is required to rift a continent?, Bialas, R; Buck, W R; Qin, R Earth Planet Sci Lett, Volume: 292 p.: 68-78 (2010)
Constraints on asthenospheric flow from the depths of oceanic spreading centers: The East Pacific Rise and the Australian-Antarctic Discordance, Buck, W R; Small, C; Ryan W F B Geochem Geophys Geosyst, Volume: 10 p.: 101029/2009GC002373 (2009)
September 2005 mega-dike emplacement in the Manda-Harraro nascent oceanic rift (Afar depression), Ayele, A; Keir, D: Ebinger, C; Wright, T J; Stuart, G W; Buck, W R; Jacques, E; Ogubazghi, G; Sholan, J Geophys Res Letts, Volume: 36 p.: 101029/2009GL039605 (2009)
The role of sedimentation in the development of rifts; Applications to the Gulf of California, Bialas, R; Buck, W R Tectonics, Volume: 28 p.: 101029/2008TC002394 (2009)
Constraints on asthenospheric flow from the deepest spreading centers, Buck, W R; Small, C; Ryan, W B F G-cubed, Volume: 10, Issue: n9 p.: 1-23 (2009)
Why meter-wide dikes at oceanic spreading centers?, Qin, R.; Buck, W. R. Earth and Planetary Science Letters Jan 30, Volume: 265, Issue: 3-4 p.: 466-474 (2008) DOI 10.1016/j.epsl.2007.10.044
Capturing magma intrusion and faulting processes during continental rupture: seismicity of the Dabbahu (Afar) rift, Ebinger, C. J.; Keir, D.; Ayele, A.; Calais, E.; Wright, T. J.; Belachew, M.; Hammond, J. O. S.; Campbell, E.; Buck, W. R. Geophysical Journal International Sep, Volume: 174, Issue: 3 p.: 1138-1152 (2008) DOI 10.1111/j.1365-246X.2008.03877.x
Role of melt supply in oceanic detachment faulting and formation of megamullions, Tucholke, B. E.; Behn, M. D.; Buck, W. R.; Lin, J. Geology Jun, Volume: 36, Issue: 6 p.: 455-458 (2008) Doi 10.1130/G24639a.1
Plateau collapse model for the transantarctic mountains-west Antarctic rift system: Insights from numerical experiments, Bialas, R. W.; Buck, W. R.; Studinger, M.; Fitzgerald, P. G. Geology Aug, Volume: 35, Issue: 8 p.: 687-690 (2007)
Control of rheological stratification on rifting geometry: a symmetric model resolving the upper plate paradox, Nagel, T. J.; Buck, W. R. International Journal of Earth Sciences Nov, Volume: 96, Issue: 6 p.: 1047-1057 (2007) DOI 10.1007/s00531-007-0195-x
Comment on "Mechanics of tidally driven fractures in Europa's ice shell" by S. Lee, R.T. Pappalardo, and N.C. Makris [2005. Icarus 177, 367-379], Qin, R.; Buck, W. R.; Germanovich, L. Icarus Aug, Volume: 189, Issue: 2 p.: 595-597 (2007) DOI 10.1016/j.icarus.2007.01.013
Channel flow and the development of parallel-dipping normal faults, Nagel, T. J.; Buck, W. R. Journal of Geophysical Research-Solid Earth Aug 24, Volume: 111, Issue: B8 p.: - (2006) Doi 10.1029/2005jb004000
Crustal architecture of the Transantarctic Mountains between the Scott and Reedy Glacier region and South Pole from aerogeophysical data, Studinger, M.; Bell, R. E.; Fitzgerald, P. G.; Buck, W. R. Earth and Planetary Science Letters Oct 15, Volume: 250, Issue: 1-2 p.: 182-199 (2006) DOI 10.1016/j.epsl.2006.07.035
Flexing is not stretching: An analogue study of flexure-induced fault populations, Supak, S.; Bohnenstiehl, D. R.; Buck, W. R. Earth and Planetary Science Letters Jun 15, Volume: 246, Issue: 1-2 p.: 125-137 (2006) DOI 10.1016/j.epsl.2006.03.028
The rise and fall of axial highs during ridge jumps, Shah, A. K.; Buck, W. R. Journal of Geophysical Research-Solid Earth Aug 17, Volume: 111, Issue: B8 p.: - (2006) Doi 10.1029/2005jb003657
Tectonic stress and magma chamber size as controls on dike propagation: Constraints from the 1975-1984 Krafla rifting episode, Buck, W. R.; Einarsson, P.; Brandsdottir, B. Journal of Geophysical Research-Solid Earth Dec 9, Volume: 111, Issue: B12 p.: - (2006) Doi 10.1029/2005jb003879
Topographic controls on dike injection in volcanic rift zones, Behn, M. D.; Buck, W. R.; Sacks, I. S. Earth and Planetary Science Letters Jun 30, Volume: 246, Issue: 3-4 p.: 188-196 (2006) DOI 10.1016/j.epsl.2006.04.005
Effect of lithospheric geometry on rift valley relief, Qin, R.; Buck, W. R. Journal of Geophysical Research-Solid Earth Mar 19, Volume: 110, Issue: B3 p.: - (2005) Doi 10.1029/2004jb003411
Flexural uplift of a lithospheric slab near the Vema transform (Central Atlantic): Timing and mechanisms, Bonatti, E.; Brunelli, D.; Buck, W. R.; Cipriani, A.; Fabretti, P.; Ferrante, V.; Gasperini, L.; Ligi, M. Earth and Planetary Science Letters Dec 15, Volume: 240, Issue: 3-4 p.: 642-655 (2005) DOI 10.1016/j.epsl.2005.10.010
Modes of faulting at mid-ocean ridges, Buck, W. R.; Lavier, L. L.; Poliakov, A. N. B. Nature Apr 7, Volume: 434, Issue: 7034 p.: 719-723 (2005) Doi 10.1038/Nature03358
Sub-ice geology inland of the Transantarctic Mountains in light of new aerogeophysical data, Studinger, M.; Bell, R. E.; Buck, W. R.; Karner, G. D.; Blankenship, D. D. Earth and Planetary Science Letters Apr 15, Volume: 220, Issue: 3-4 p.: 391-408 (2004) Doi 10.1016/S0012-821x(04)00066-4
Symmetric alternative to asymmetric rifting models, Nagel, T. J.; Buck, W. R. Geology Nov, Volume: 32, Issue: 11 p.: 937-940 (2004) Doi 10.1130/G20785.1
A numerical model of lithospheric extension producing fault-bounded basins and ranges, Buck, W. R.; Lavier, L. L.; Babeyko, A. International Geology Review Aug, Volume: 45, Issue: 8 p.: 712-723 (2003)
Plate bending stresses at axial highs, and implications for faulting behavior, Shah, A. K.; Buck, W. R. Earth and Planetary Science Letters Jun 30, Volume: 211, Issue: 3-4 p.: 343-356 (2003) Doi 10.1016/S0012-821x(03)00187-0
Half graben versus large-offset low-angle normal fault: Importance of keeping cool during normal faulting, Lavier, L. L.; Buck, W. R. Journal of Geophysical Research-Solid Earth Jun, Volume: 107, Issue: B6 p.: - (2002) Doi 10.1029/2001jb000513
Accretional curvature of lithosphere at magmatic spreading centers and the flexural support of axial highs, Buck, W. R. Journal of Geophysical Research-Solid Earth Mar 10, Volume: 106, Issue: B3 p.: 3953-3960 (2001)
Causes for axial high topography at mid-ocean ridges and the role of crustal thermal structure, Shah, A. K.; Buck, W. R. Journal of Geophysical Research-Solid Earth Dec 10, Volume: 106, Issue: B12 p.: 30865-30879 (2001)
Near-axis subsidence rates, hydrothermal circulation, and thermal structure of mid-ocean ridge crests, Cochran, J. R.; Buck, W. R. Journal of Geophysical Research-Solid Earth Sep 10, Volume: 106, Issue: B9 p.: 19233-19258 (2001)
Factors controlling normal fault offset in an ideal brittle layer, Lavier, L. L.; Buck, W. R.; Poliakov, A. N. B. Journal of Geophysical Research-Solid Earth Oct 10, Volume: 105, Issue: B10 p.: 23431-23442 (2000)
The dynamics of extensional sedimentary basins: constraints from subsidence inversion - Discussion, Buck, W. R.; White, N.; Gallagher, K.; Watts, A. B.; McKenzie, D.; Kusznir, T.; Geli, L. Philosophical Transactions of the Royal Society of London Series a-Mathematical Physical and Engineering Sciences Apr 15, Volume: 357, Issue: 1753 p.: 830-834 (1999)
How to make a rift wide, Buck, W. R.; Lavier, L. L.; Poliakov, A. N. B. Philosophical Transactions of the Royal Society of London Series a-Mathematical Physical and Engineering Sciences Apr 15, Volume: 357, Issue: 1753 p.: 671-690 (1999)
Self-consistent rolling-hinge model for the evolution of large-offset low-angle normal faults, Lavier, L. L.; Buck, W. R.; Poliakov, A. N. B. Geology Dec, Volume: 27, Issue: 12 p.: 1127-1130 (1999)
Abyssal hills formed by stretching oceanic lithosphere, Buck, W. R.; Poliakov, A. N. B. Nature Mar 19, Volume: 392, Issue: 6673 p.: 272-275 (1998)
Styles of extensional decoupling, Hopper, J. R.; Buck, W. R. Geology Aug, Volume: 26, Issue: 8 p.: 699-702 (1998)
Bending thin lithosphere causes localized 'snapping' and not distributed 'crunching': Implications for abyssal hill formation, Buck, W. R. Geophysical Research Letters Oct 15, Volume: 24, Issue: 20 p.: 2531-2534 (1997)
Controls on extrusion at mid-ocean ridges, Buck, W. R.; Carbotte, S. M.; Mutter, C. Geology Oct, Volume: 25, Issue: 10 p.: 935-938 (1997)
Stress-field rotation and rooted detachment faults: A Coulomb failure analysis, Wills, S.; Buck, W. R. Journal of Geophysical Research-Solid Earth Sep 10, Volume: 102, Issue: B9 p.: 20503-20514 (1997)
The effect of lower crustal flow on continental extension and passive margin formation., Hopper, J. R.; Buck, W. R. Journal of Geophysical Research-Solid Earth Sep 10, Volume: 101, Issue: B9 p.: 20175-20194 (1996)
Analog Model of Gravitational Collapse and Surface Extension during Continental Convergence, Buck, W. R.; Sokoutis, D. Nature Jun 30, Volume: 369, Issue: 6483 p.: 737-740 (1994)
Some Theoretical Predictions on the Relationships among Spreading Rate, Mantle Temperature, and Crustal Thickness, Su, W. S.; Mutter, C. Z.; Mutter, J. C.; Buck, W. R. Journal of Geophysical Research-Solid Earth Feb 10, Volume: 99, Issue: B2 p.: 3215-3227 (1994)
Buoyancy Effects on Mantle Flow under Midocean Ridges, Su, W. S.; Buck, W. R. Journal of Geophysical Research-Solid Earth Jul 10, Volume: 98, Issue: B7 p.: 12191-12205 (1993)
Effect of Lithospheric Thickness on the Formation of High-Angle and Low-Angle Normal Faults, Buck, W. R. Geology Oct, Volume: 21, Issue: 10 p.: 933-936 (1993)
The Initiation of Rifting at Constant Tectonic Force - Role of Diffusion Creep, Hopper, J. R.; Buck, W. R. Journal of Geophysical Research-Solid Earth Sep 10, Volume: 98, Issue: B9 p.: 16213-16221 (1993)
Crustal Control of Ridge Segmentation Inferred from Observations of the Reykjanes Ridge, Bell, R. E.; Buck, W. R. Nature Jun 18, Volume: 357, Issue: 6379 p.: 583-586 (1992)
Global Decoupling of Crust and Mantle - Implications for Topography, Geoid and Mantle Viscosity on Venus, Buck, W. R. Geophysical Research Letters Nov 3, Volume: 19, Issue: 21 p.: 2111-2114 (1992)
Modes of Continental Lithospheric Extension, Buck, W. R. Journal of Geophysical Research-Solid Earth Nov 10, Volume: 96, Issue: B12 p.: 20161-20178 (1991)
Fission-Track Analysis of Basement Apatites at the Western Margin of the Gulf-of-Suez Rift, Egypt - Evidence for Synchroneity of Uplift and Subsidence, Omar, G. I.; Steckler, M. S.; Buck, W. R.; Kohn, B. P. Earth and Planetary Science Letters Sep, Volume: 94, Issue: 3-4 p.: 316-328 (1989)
Focused Mantle Upwelling Below Mid-Ocean Ridges Due to Feedback between Viscosity and Melting, Buck, W. R.; Su, W. S. Geophysical Research Letters Jul, Volume: 16, Issue: 7 p.: 641-644 (1989)
Convective Partial Melting .1. A Model for the Formation of Thick Basaltic Sequences during the Initiation of Spreading, Mutter, J. C.; Buck, W. R.; Zehnder, C. M. Journal of Geophysical Research-Solid Earth and Planets Feb 10, Volume: 93, Issue: B2 p.: 1031-1048 (1988)
Flexural Rotation of Normal Faults, Buck, W. R. Tectonics Oct, Volume: 7, Issue: 5 p.: 959-973 (1988)
Thermal Consequences of Lithospheric Extension - Pure and Simple, Buck, W. R.; Martinez, F.; Steckler, M. S.; Cochran, J. R. Tectonics Apr, Volume: 7, Issue: 2 p.: 213-234 (1988)
Uplift and Subsidence of the Suez Rift - Constraints from Fission-Track Analysis and Sediment Backstripping, Steckler, M. S.; Omar, G. I.; Buck, W. R. Aapg Bulletin-American Association of Petroleum Geologists Aug, Volume: 72, Issue: 8 p.: 1025-1025 (1988)
Analysis of the Cooling of a Variable-Viscosity Fluid with Applications to the Earth, Buck, W. R. Geophysical Journal of the Royal Astronomical Society May, Volume: 89, Issue: 2 p.: 549-577 (1987)

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