# preferredTitle
Jane and Ken R. Williams Chair in Ocean Drilling Science

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# keywords[]
3709 Physical Geography And Environmental Geoscience

# educationAndTraining[].organization.label
Carleton University - (Ottawa, Ontario, Canada)

# educationAndTraining[].organization.label
Columbia University - (New York, New York, United States)

# educationAndTraining[].organization.label
McMaster University - (Hamilton, Ontario, Canada)

# educationAndTraining[].organization.label
Columbia University - (New York, New York, United States)

# publications[].label
232Th-derived dust fluxes as a marker of deglacial changes in ITCZ position and intensity in the Eastern Equatorial Pacific

# publications[].label
Sediment focusing creates 100-ka cycles in interplanetary dust accumulation on the Ontong Java Plateau

# publications[].label
Reconstruction of intermediate water circulation in the tropical North Atlantic during the past 22,000 years

# publications[].label
The LamontDoherty Geological Observatory Isolab 54 isotope ratio mass spectrometer

# publications[].label
Water column Th-230 systematics in the eastern equatorial Pacific Ocean and implications for sediment focusing

# publications[].label
Sediment redistribution and grainsize effects on Th-230-normalized mass accumulation rates and focusing factors in the Panama Basin

# publications[].label
Thorium-derived dust fluxes to the tropical Pacific Ocean, 58 Ma

# publications[].label
1.1 Ga K-rich alkaline plutonism in the SW Grenville Province

# publications[].label
Solar forcing of Florida Straits surface salinity during the early Holocene

# publications[].label
Dynamic nutrient regime and phytoplankton response in the eastern equatorial Pacific Ocean over the past 25,000 years

# publications[].label
Deep Equatorial Pacific Ocean Oxygenation and Atmospheric CO2 Over The Last Ice Age.

# publications[].label
Contrasting watershed-scale trends in runoff and sediment yield complicate rangeland water resources planning

# publications[].label
Comment on "Do geochemical estimates of sediment focusing pass the sediment test in the equatorial Pacific?'' by M. Lyle et al.

# publications[].label
Particle sorting during sediment redistribution processes and the effect on Th-230-normalized mass accumulation rates

# publications[].label
An isotopic study of the Ni-Cu-PGE-rich Wellgreen intrusion of the Wrangellia Terrane: Evidence for hydrothermal mobilization of rhenium and osmium

# publications[].label
RECONSTRUCTING SURFACE WATER [CO                     3                     2-                     ] CHANGES IN THE EASTERN EQUATORIAL PACIFIC ACROSS TWO GLACIAL-INTERGLACIAL CLIMATE TRANSITIONS

# publications[].label
Strontium isotope variations in the lower Mississippi River and its estuarine mixing zone

# publications[].label
Contrasting watershed-scale trends in runoff and sediment yield complicate rangeland water resources planning

# publications[].label
Deglacial changes in dust flux in the eastern equatorial Pacific

# publications[].label
Extraterrestrial 3He as a tracer of marine sediment transport and accumulation

# publications[].label
Ocean dynamics, not dust, have controlled equatorial Pacific productivity over the past 500,000 years.

# publications[].publisher
Proceedings of the National Academy of Sciences

# publications[].label
Speciation of strontium in particulates and sediments from the Mississippi River mixing zone1 1Associate editor: S. Krishnaswami

# publications[].label
Characterizing groundwater-surface water interaction across the Brazos River watershed, Texas, with uranium isotopes

# publications[].label
Dissolved and particulate Th-230-Th-232 in the Central Equatorial Pacific Ocean: Evidence for far-field transport of the East Pacific Rise hydrothermal plume

# publications[].label
Isotopic evidence for the crustal evolution of the Frontenac Arch in the Grenville Province of Ontario, Canada

# publications[].label
Dynamics of biological productivity and carbon export in the easternmost equatorial Pacific Ocean over the last 25,000 years

# publications[].label
Insights into the deglacial variability of phytoplankton community structure in the eastern equatorial Pacific Ocean using [231Pa/230Th]xs and opal-carbonate fluxes.

# publications[].label
An Assessment of xsBa Flux as a Paleoproductivity Indicator and Its Water-Depth Dependence in the Easternmost Equatorial Pacific Ocean

# publications[].label
A Pb isotope record of mid-Atlantic US atmospheric Pb emissions in Chesapeake Bay sediments

# publications[].label
The Penultimate Glacial Termination and Variability of the Pacific Intertropical Convergence Zone

# publications[].label
Constraints on the magnitude of the deglacial migration of the ITCZ in the Central Equatorial Pacific Ocean

# publications[].label
Lead Isotopes in Tree Rings: Chronology of Pollution in Bayou Trepagnier, Louisiana

# publications[].label
Sediment focusing in the Panama Basin, Eastern Equatorial Pacific Ocean

# publications[].label
Testing the response of xs(230)Th and extraterrestrial He-3 to sediment redistribution at the Blake Ridge, western North Atlantic

# publications[].label
Composition and depth distribution of hydrocarbons in Barataria Bay marsh sediments after the Deepwater Horizon oil spill.

# publications[].label
Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES-era data

# publications[].label
Chemical reactions in the atomization of molybdenum in graphite furnace atomic absorption spectrometry

# publications[].label
Tracking the source of contaminant lead in children's blood.

# publications[].label
Archean, penokian (1.9 Ga) and Grenville (1.2 Ga) crustal extraction events recorded in the grenville province of ontario

# publications[].label
Biogenic sedimentation in the equatorial Pacific: Carbon cycling and paleoproduction, 12-24 Ma

# publications[].label
A 1,800-million-year-old Proterozoic gneiss terrane in Islay with implications for the crustal structure and evolution of Britain

# publications[].label
The accretion rate of extraterrestrial 3He based on oceanic 230Th flux and the relation to Os isotope variation over the past 200,000 years in an Indian Ocean core

# publications[].label
Th-230 Normalization: New Insights on an Essential Tool for Quantifying Sedimentary Fluxes in the Modern and Quaternary Ocean

# publications[].label
Comparison of one- and two-color ionization schemes for the analysis for osmium and rhenium isotopic ratios by sputter-induced resonance ionization mass spectrometry

# publications[].label
Iron fertilization of primary productivity by volcanic ash in the Late Cretaceous (Cenomanian) Western Interior Seaway

# publications[].label
Temporal variability of uranium concentrations and U-234/U-238 activity ratios in the Mississippi river and its tributaries

# publications[].label
Lead contamination in a wetland watershed: isotopes as fingerprints of pollution

# publications[].label
Reply to: No evidence for equatorial Pacific dust fertilization

# publications[].label
Os isotope systematics in ocean island basalts

# publications[].label
A comparative study of accumulation rates derived by He and Th isotope analysis of marine sediments

# publications[].label
The response of excess Th-230 and extraterrestrial He-3 to sediment redistribution at the Blake Ridge, western North Atlantic

# publications[].label
The behavior of natural and anthropogenic osmium in Long Island Sound, an urban estuary in the eastern U.S.

# publications[].label
A 28-ka history of sea surface temperature, primary productivity and planktonic community variability in the western Arabian Sea

# publications[].label
Tracking the Source of High Pb Levels in Childrens Blood

# publications[].label
Deglacial variability of Antarctic Intermediate Water penetration into the North Atlantic from authigenic neodymium isotope ratios

# publications[].label
AN EQUATORIAL EXCURSION OF THE ITCZ DURING TERMINATION II IN THE CEP

# publications[].label
Mechanisms of atomization of molybdenum in graphite furnace atomic absorption spectrometry

# publications[].label
A proterozoic crustal terrane recognized in scotland

# publications[].label
Brachiopod geochemical records from across the Carboniferous seas of North America: Evidence for salinity gradients, stratification, and circulation patterns

# publications[].label
Re-Os isotopic systematics in chromitites from the Stillwater Complex, Montana, USA

# publications[].label
Late Holocene sedimentation in a high Arctic coastal setting: Simpson Lagoon and Colville Delta, Alaska

# publications[].label
Pyrogenic inputs of anthropogenic Pb and Hg to sediments of the Hood Canal, Washington, in the 20th century: source evidence from stable Pb isotopes and PAH signatures.

# publications[].label
Solid and soluble products of engineered water/rock interactions in Eagle Ford Group chemofacies

# publications[].label
Extraterrestrial He-3 and constraints on eolian fluxes and provenance in sediments from the Shatsky Rise

# publications[].label
Radionuclide and biomarker proxies of past ocean circulation and productivity in the Arabian Sea

# publications[].label
Os isotope systematics of La Palma, Canary Islands: Evidence for recycled crust in the mantle source of HIMU ocean islands

# publications[].label
Sediment size fractionation and focusing in the equatorial Pacific: Effect on Th-230 normalization and paleoflux measurements

# publications[].label
Terrigenous helium in deep-sea sediments

# publications[].label
Linking biomarkers with elemental geochemistry to reveal controls on organic richness in Devonian-Mississippian mudrocks of Oklahoma

# publications[].label
Extraterrestrial He-3 in Paleocene sediments from Shatsky Rise: Constraints on sedimentation rate variability

# publications[].label
Sediment focusing in the central equatorial Pacific Ocean

# publications[].label
No iron fertilization in the equatorial Pacific Ocean during the last ice age.

# publications[].label
Deglacial dust provenance changes in the Eastern Equatorial Pacific and implications for ITCZ movement

# publications[].label
Abrupt intensification of the SW Indian Ocean monsoon during the last deglaciation: constraints from Th, Pa, and He isotopes

# publications[].label
Re-assessing the surface cycling of molybdenum and rhenium

# publications[].label
Millennial-scale iron fertilization of the eastern equatorial Pacific over the past 100,000 years

# publications[].label
Solid and Soluble Products of Engineered Water/Rock Interactions in Eagle Ford Group Chemofacies

# publications[].label
Comparison of eastern tropical Pacific TEX86 and Globigerinoides ruber Mg/Ca derived sea surface temperatures: Insights from the Holocene and Last Glacial Maximum

# publications[].label
Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES-era data

# publications[].label
Origin of Indus ophiolite-hosted ophicarbonate veins: Isotopic evidence of mixing between seawater and continental crust-derived fluid during Neo-Tethys closure

# publications[].label
Variations in productivity and eolian fluxes in the northeastern Arabian Sea during the past 110 ka

# publications[].label
BARIUM CONCENTRATIONS AS A PROXY FOR EQUATORIAL PACIFIC PRODUCTIVITY DURING THE PAST 140,000 YEARS

# researcherOn[].label
Collaborative Research: Linking Atmospheric CO2 to Millennial Changes in Atmospheric and Oceanic Circulation in the Eastern Equatorial Pacific Ocean over the Past 100 kyr

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# researcherOn[].label
P2C2:  Collaborative Research: Dust Deposition, Paleo-Export Production, and Migration of the ITCZ Through the Last Glacial Cycle in the West-Central Pacific (Line Islands)

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# researcherOn[].label
MRI: Acquisition of a Multicollector Inductively Coupled Plasma Mass Spectrometer and Laser System for Investigating the Evolution of the Earth’s Climate, Oceans, and Tectonics

# researcherOn[].awardedBy.label
National Science Foundation - (Arlington, Virginia, United States)

# streetAddress
Texas A&M University; Geology; 3115 TAMU

# inTheNews[].label
Study Reveals Ancient Ocean Oxygen Levels Associated With Changing Atmospheric Carbon Dioxide

# etdChairOf[].label
Dincer, Zeynep (2013-05). Tracking Oil from the Deepwater Horizon Oil Spill in Barataria Bay Sediments. Master's Thesis.

# etdChairOf[].label
Kelly, Caitlyn Marie (2016-05). Molybdenum, Vanadium and Nickel Covariation as an Indicator of Paleo-Redox Conditions and Basin Restriction Within the Eagle Ford Formation- Implications for the Interpretation of Volcanic Ash Fertilization. Master's Thesis.

# etdChairOf[].label
Ibrahim, Rami (2015-11). The Effect of Particle Sorting on 230Th Sediment Inventories in the Eastern Equatorial Pacific Ocean. Master's Thesis.

# etdChairOf[].label
Loveley, Matthew Robert (2017-07). Constraints and Applications of U-Th Systematics to Climate Reconstructions. Doctoral Dissertation.

# etdChairOf[].label
McClenning, Bree Kathleen 1985- (2012-11). Geomorphic and Geochemical Characteristics of Five Alpine Fens in the San Juan Mountains, Colorado. Master's Thesis.

# etdChairOf[].label
Wilcoxson, Ryan Garrett (2018-04). Inorganic Elemental Analysis of Woodford and Mississippian Mudrocks: Implication for Petroleum Systems Analysis. Master's Thesis.

# etdChairOf[].label
Xie, Ruifang (2013-04). Tracing Paleoclimate over the Past 25,000 Years Using Evidence from Radiogenic Isotopes. Doctoral Dissertation.

# etdChairOf[].label
McBee, Jayme M (2014-01). Biogeochemistry of Isotopically-distinct Sources of Lead in a Former WWII Aerial Gunnery Range. Master's Thesis.

# etdChairOf[].label
Singh, Ajay 1980- (2012-12). Eastern Equatorial Pacific Ocean Sedimentation: Investigating Constant Flux Proxies. Doctoral Dissertation.

# etdChairOf[].label
Lopez, Grecia Ivonne (2015-08). Dissolved and Particulate 230Th - 232Th Systematics in the Central Equatorial Pacific Ocean : Evidence for Far-Field Transport of the East Pacific Rise Hydrothermal Plume. Master's Thesis.

# etdChairOf[].label
Prince, Benjamin Hays (2017-11). Tracing Water Sources Along the Brazos River Alluvial Aquifer with 234U/238U Activity Ratios and Uranium Concentrations. Master's Thesis.

# etdChairOf[].label
Reimi Sipala, Maria Alejandra (2018-05). Radiogenic Isotopes and Late Pleistocene Climate Changes in the Central Equatorial Pacific. Doctoral Dissertation.