Member Since 1977
Timothy Harrison
Distinguished Professor, University of California Los Angeles
AGU Research
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A Critique of Deep Time Geology
WIDENING THE GEOSCIENCES: A HISTORICAL AND PHILOSOPHICAL PERSPECTIVE ORAL
science and society | 13 december 2023
T. Mark Harrison, Adrian Lenardic
One explanation for the broad range of views of what constitutes a philosophy of science is that there is no such thing. Geochemistry came of age ~60 ...
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Thermobarometry of Ti and Zr Partitioning Between Quartz, Rutile, and Zircon
UNDER PRESSURE: MEASUREMENT AND INTERPRETATION OF PRESSURE-DEPENDENT PARAMETERS AND DECOMPRESSION RATES IN MAGMAS II POSTER
volcanology, geochemistry and petrology | 12 december 2023
Heather Kirkpatrick, Dustin Trail, T. Mark Harriso...
Examination of trace element partitioning into quartz, rutile, and zircon has allowed for the calibration of several accurate and precise trace elemen...
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Constraining igneous sources of phosphorus using detrital zircon inclusions and geochemistry
EXPLORING THE INTERSECTION OF EARLY EARTH ENVIRONMENTS, PREBIOTIC CHEMISTRY, AND LIFE’S EMERGENCE I ORAL
planetary sciences | 11 december 2023
Elizabeth A. Bell, Heather Kirkpatrick, T. Mark Ha...
Phosphorus is an important limiting nutrient in the modern biosphere and must have played a similar role on early Earth and in prebiotic chemistry. Th...
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On a Scientific Approach for Deep Time Investigations
PERSPECTIVES OF EARTH AND SPACE SCIENTISTS
15 may 2023
T. Mark Harrison
I came to geology through a metaphoric back door and was gifted a series of visionary mentors who imbued me with an outside‐the‐box vie...
Are Zr stable isotopes tracking magmatic differentiation in the zoned La Posta pluton?
NOVEL ISOTOPES IN EARTH SYSTEMS I POSTERS
volcanology, geochemistry and petrology | 14 december 2020
Heather Kirkpatrick, T. Mark Harrison, Elizabeth A...
Non-traditional stable isotopes provide invaluable information about magmatic systems. Recently, with the proliferation of the MC-ICPMS and refinement...
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Can the Late Heavy Bombardment hypothesis be resuscitated?
ACCRETION AND DIFFERENTIATION OF ROCKY PLANETS: PERSPECTIVES FROM GEOPHYSICS, GEOCHEMISTRY, AND ASTRONOMY II POSTERS
study of earth's deep interior | 14 december 2020
Andrew F. Parisi, T. Mark Harrison, Cameron M. Mer...
The concept of a Late Heavy Bombardment (LHB) of Moon at ~3.9 Ga, based on geochemical arguments, was initially controversial but became widely accept...
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Influence of tectonic damage on erosion and topography of eastern Tibet
PROGRESS IN TECTONIC GEOMORPHOLOGY: NOVEL METHODS AND NEW APPLICATIONS I
earth and planetary surface processes | 10 december 2020
Seulgi Moon, Heather Kirkpatrick, Gen Li, An Yin, ...
Tectonic deformation can influence spatiotemporal patterns of erosion by changing both base-level and the mechanical state of bedrock. Although base-l...
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A Plan For Detecting Evidence of Hadean Life
DETECTING LIFE THROUGH SPACE AND TIME: FROM GEOCHEMISTRY TO BIOLOGY I
planetary sciences | 09 december 2020
T. Mark Harrison, Elizabeth A. Bell
The paucity of an early (>3.8 Ga) Earth rock record and the intense metamorphism of what little is left makes challenging the definitive detection ...
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