E. Troy Rasbury
· Professor Sedimentary and Isotope GeochemistryStony Brook University · Geosciences
Active 1992–2026
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About
E. Troy Rasbury is a Professor in the Department of Geosciences at Stony Brook University. He holds a B.S. from Midwestern State University, an M.S. from Tulane University, and a Ph.D. from SUNY Stony Brook. His research focuses on exploring fundamental problems in geology related to time resolution and Earth's history as recorded in sedimentary archives. A major aspect of his work involves directly dating sedimentary carbonates using U-Pb methods, which includes studying the environmental conditions of carbonate formation and understanding U speciation in depositional environments. He employs techniques such as trace element mapping, fission track mapping, autoradiography, and laser ablation ICPMS to improve sample selection and dating accuracy. Rasbury has contributed to innovations in laser ablation ICPMS dating, including the development of widely used reference materials. His research extends to applying boron isotopes to study rocks, soils, waters, and plants, collaborating on projects that investigate mantle sources, groundwater nitrate tracing, ocean chemistry changes through fossil analysis, and plant uptake mechanisms. His work has resulted in numerous publications across geoscience disciplines, emphasizing his expertise in isotope geochemistry, sedimentary geology, and geochronology.
Research topics
- Geology
- Chemistry
- Geochemistry
- Paleontology
- Oceanography
- Ecology
- Environmental chemistry
- Mineralogy
- Biology
- Climatology
Selected publications
Nature Communications · 2022 · 49 citations
The Cenozoic landscape evolution in southwestern North America is ascribed to crustal isostasy, dynamic topography, or lithosphere tectonics, but their relative contributions remain controversial. Here we reconstruct landscape history since the late Eocene by investigating the interplay between mantle convection, lithosphere dynamics, climate, and surface processes using fully coupled four-dimensional numerical models. Our quantified depth-dependent strain rate and stress history within the lith…
Isotopic and sedimentary signature of megathrust ruptures along the Japan subduction margin
Marine Geology · 2020 · 41 citations
Climate of the past · 2020 · 37 citations
Abstract. Climatic oscillations have been developed through the (Early) Jurassic from marine sedimentary archives but remain unclear from terrestrial records. This work presents investigation of climate-sensitive sediments and carbon and oxygen isotope analyses of lacustrine and pedogenic carbonates for the Early Jurassic Ziliujing Formation taken from the Basin in southwestern China. Sedimentary and stable isotope proxies manifest that an overall secular (semi)arid climate dominated the Sichuan…
Frontiers in Environmental Science · 2020 · 18 citations
Senior authorCorrespondingStable isotopes of oxygen, nitrogen and boron were used to identify the sources of NO3- in submarine groundwater discharge into a large estuary (Long Island Sound, NY). Potential contaminants such as manure, septic waste and fertilizer overlap in 15N and18O but have been shown to have distinctive 11B in non-coastal settings. Two sites on the north shore of Long Island (NY) were studied with different, up-gradient land use, representative of mixed medium-density residential housing and agricu…
Science Advances · 2021 · 15 citations
Senior authorCorrespondingTectonic activity can drive speciation and sedimentation, potentially causing the fossil and rock records to share common patterns through time. The Basin and Range of western North America arose through widespread extension and collapse of topographic highlands in the Miocene, creating numerous basins with rich mammalian fossil records. We analyzed patterns of mammalian species richness from 36 to 0 million years ago in relation to the history of sediment accumulation to test whether intervals…
Recent grants
Frequent coauthors
- 42 shared
Sidney R. Hemming
Lamont-Doherty Earth Observatory
- 28 shared
Kathleen Wooton
- 27 shared
Ken Ikehara
Geological Survey of Japan
- 26 shared
Gilbert N. Hanson
Stony Brook University
- 26 shared
S. J. Jaret
- 26 shared
Cecilia M. McHugh
- 25 shared
Jennifer M. Cole
- 25 shared
Min Luo
Shanghai Ocean University
Labs
Rasbury Isotope Lab (FIRST)PI
Education
- 1984
B.S.
Midwestern State University
- 1990
M.S.
Tulane University
- 1998
Ph.D.
SUNY Stony Brook
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