Adam C. Maloof
· Professor of GeosciencesVerifiedPrinceton University · Geosciences
Active 1986–2025
About
Adam C. Maloof is a Professor of Geosciences at Princeton University, where he is a faculty member in the Department of Geosciences. He joined Princeton as an assistant professor of geology in July 2006 and was promoted to associate professor with tenure in January 2012. Maloof is the founder of The Princeton Grinder Lab (GIRI) Group and leads the Maloof Research Group. His research focuses on Earth history, utilizing original field observations at the scale of maps, rock outcrops, and thin sections. His group's current work involves analyzing sedimentary and volcanic rocks to extract information about Earth's ancient magnetic field, the relative motion of continents, perturbations to the global carbon cycle, and the coevolution of life and climate.
Research signals
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Research topics
- Geology
- Oceanography
- Astrobiology
- Physics
- Paleontology
- Engineering
- Biology
- Physical geography
- Astronomy
- Geodesy
- Geomorphology
- Geography
- Climatology
- Aerospace engineering
- Geochemistry
- Chemistry
- Meteorology
- Environmental science
Selected publications
2025-01-01
articleJournal of Systematic Palaeontology · 2025-06-03
articleEarth and Planetary Science Letters · 2025-06-20 · 1 citations
articleUsing large language models to generate baseball spray charts in the absence of numerical data
Proceedings of the Institution of Mechanical Engineers Part P Journal of Sports Engineering and Technology · 2024-07-24 · 1 citations
articleAlthough baseball has been revolutionized by analytics, not all teams have access to high quality data. While many high school, collegiate, and club teams do not have high speed cameras and radars, they often do record a text-based play-by-play account of the game. The purpose of this study is to demonstrate how to use large language models to convert play-by-play information into quantitative data. We walk through the specific example of spray charts, which depict where on the baseball diamond a hitter tends to put the ball in play. Spray charts are a particularly relevant example because of their use in informing in-game strategy decisions (e.g., the infield shift). This study successfully generates spray charts for collegiate baseball players with 95% accuracy.
The where, when, and how of ooid formation: What ooids tell us about ancient seawater chemistry
Earth and Planetary Science Letters · 2024-05-07 · 7 citations
articleSenior authorShallow carbonate geochemistry in the Bahamas since the last interglacial period
Earth and Planetary Science Letters · 2024-01-20 · 8 citations
articleSenior authorJournal of Geophysical Research Solid Earth · 2024-04-01 · 9 citations
articleOpen accessAbstract Recovering ancient records of Earth's magnetic field is essential for determining the role of the magnetosphere in protecting early Earth from cosmic radiation and atmospheric escape. We present paleomagnetic field tests hinting that a record of Earth's 3.7‐billion‐year (Ga) old magnetic field may be preserved in the northeastern Isua Supracrustal Belt as a chemical remanent magnetization acquired during amphibolite‐grade metamorphism in the banded iron formation. Multiple petrological and geochronological lines of evidence indicate that the northernmost part of Isua has not experienced metamorphic temperatures exceeding 380°C since the Eoarchean, suggesting the rocks have not been significantly heated since magnetization was acquired. We use “pseudo” baked contact tests (intrusions emplaced 3.26–3.5 Ga ago) and a fold test (folding 3.6 Ga ago) to demonstrate that some samples preserve a ca. 3.7 Ga record of the magnetic field. We recover a field strength of >15 µT. This suggests that Earth's magnetic field may have been weak enough to enhance atmospheric escape during the Archean.
Zenodo (CERN European Organization for Nuclear Research) · 2023-06-18 · 1 citations
datasetOpen accessWe present paleomagnetic field tests that hint that a record of Earth’s 3.7-billion-year (Ga) old magnetic field may be preserved in the banded iron formation from the northeastern Isua Supracrustal belt. Magnetite in the banded iron formation has a Pb-Pb age of 3.7 Ga (Frei et al., 1999). The U-Pb system has a closure temperature between 150-400°C for the magnetite grain size range observed in the banded iron formation, suggesting the rocks have not been significantly heated since magnetization was acquired. We use a `pseudo' baked contact test to assess paleodirections in the banded iron formation that have avoided thermal overprints from subsequent igneous intrusions. We demonstrate that specimens that pass this test also go on to pass fold and reversal tests. We argue that the banded iron formation acquired a chemical remanent magnetization via magnetite growth during a multi-phase Eoarchean metamorphic event. We recover what appears to be the oldest known whole rock record of the geomagnetic field, and oldest known records of reversals and secular variation suggesting that Earth’s magnetic field behaviour in the Eoarchean may have been similar to that observed today.
3D RECONSTRUCTIONS OF AN EDIACARAN SPONGE-GRADE ANIMAL FROM THE PATOM UPLIFT OF SIBERIA
Abstracts with programs - Geological Society of America · 2023-01-01 · 1 citations
article2023-06-20 · 1 citations
preprintOpen accessWe present paleomagnetic field tests that hint that a record of Earth’s 3.7-billion-year (Ga) old magnetic field may be preserved as a chemical remanent magnetization acquired during amphibolite-grade metamorphism in the banded iron formation from the northeastern Isua Supracrustal Belt. Multiple petrological and geochronological lines of evidence indicate that the northern most part of Isua has not experienced metamorphic temperatures exceeding 350◦C since the Eoarchean, suggesting the rocks have not been significantly heated since magnetization was acquired. We use a ‘pseudo’ baked contact test to assess paleodirections in the banded iron formation that pre-date the intrusion of the 3.26-3.5 Ga Ameralik dyke swarm. We demonstrate that specimens that pass this test also go on to pass a fold test and may also pass a reversal test. We recover what appears to be the oldest known whole rock record of the geomagnetic field, and oldest known records of reversals suggesting that Earth’s magnetic field behaviour in the Eoarchean may have been similar to that observed today.
Recent grants
NSF · $203k · 2009–2013
Collaborative Research: Quantifying Rates of Neoproterozoic Global Change, Ethiopia
NSF · $150k · 2014–2017
NSF · $1.1M · 2014–2020
NSF · $179k · 2011–2014
Development of an Integrated Serial Grinder and Photo-Imager for 3D Fossil Reconstruction
NSF · $449k · 2011–2015
Frequent coauthors
- 46 shared
Emily Geyman
- 37 shared
Nicholas L. Swanson‐Hysell
University of Minnesota
- 36 shared
B. P. Weiss
- 29 shared
Galen P. Halverson
McGill University
- 26 shared
Ryan Manzuk
- 26 shared
Blair Schoene
- 24 shared
Paul F. Hoffman
University of Edinburgh
- 20 shared
Akshay Mehra
Princeton University
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