Harrison Gray, Ph.D
Earth's surface is shaped by the transfer of sediment across time and space. As we live on the Earth's surface, understanding this transport of sediment is key to the well-being of our species. I work on solving problems asscociated with landscapes and sediment transport using the tools of computer landscape evolution modeling and the trapped-charge phenomena known as luminescence.
Education and Certifications
Ph.D Geomorphology, University of Colorado - Boulder, 2018
M.S. Geology, Univeristy of Cincinnati, 2013
B.S. Earth Sciences, University of California - Santa Cruz, 2010
Honors and Awards
Presidential Early Career Award for Scientists and Engineers (PECASE), 2025
Science and Products
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Guide to luminescence dating techniques and their application for paleoseismic research Guide to luminescence dating techniques and their application for paleoseismic research
Over the past 25 years, luminescence dating has become a key tool for dating sediments of interest in paleoseismic research. The data obtained from luminescence dating has been used to determine timing of fault displacement, calculate slip rates, and estimate earthquake recurrence intervals. The flexibility of luminescence is a key complement to other chronometers such as radiocarbon or...
Authors
Harrison Gray, Shannon Mahan, Tammy Rittenour, Michelle Nelson
Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone
Quantitative geomorphic analysis combined with cosmogenic nuclide 10Be-based geochronology and denudation rates have been used to further the understanding of the Quaternary landscape development of the Mecca Hills, a zone of transpressional uplift along the southern end of the San Andreas Fault, in southern California. The similar timing of convergent uplifts along the San Andreas Fault...
Authors
Harrison Gray, Lewis Owen, Craig Dietsch, Richard A. Beck, Marc Caffee, Robert B. Finkelman, Shannon Mahan
A high-elevation, multi-proxy biotic and environmental record of MIS 6-4 from the Ziegler Reservoir fossil site, Snowmass Village, Colorado, USA A high-elevation, multi-proxy biotic and environmental record of MIS 6-4 from the Ziegler Reservoir fossil site, Snowmass Village, Colorado, USA
In North America, terrestrial records of biodiversity and climate change that span Marine Oxygen Isotope Stage (MIS) 5 are rare. Where found, they provide insight into how the coupling of the ocean–atmosphere system is manifested in biotic and environmental records and how the biosphere responds to climate change. In 2010–2011, construction at Ziegler Reservoir near Snowmass Village...
Authors
Ian Miller, Jeffrey S. Pigati, R. Scott Anderson, Kirk Johnson, Shannon Mahan, Thomas Ager, Richard Baker, Maarten Blaauw, Jordon Bright, Peter Brown, Bruce Bryant, Zachary Calamari, Paul Carrara, Cherney Michael D., John Demboski, Scott Elias, Daniel C. Fisher, Harrison Gray, Danielle Haskett, Jeffrey S. Honke, Stephen T. Jackson, Gonzalo Jiménez-Moreno, Douglas Kline, Eric Leonard, Nathaniel Lifton, Carol Lucking, H. McDonald, Dane Miller, Daniel Muhs, Stephen Nash, Cody Newton, James Paces, Lesley Petrie, Mitchell Plummer, David Porinchu, Adam N. Rountrey, Eric Scott, Joseph Sertich, Saxon Sharpe, Gary Skipp, Laura Strickland, Richard Stucky, Robert Thompson, Jim Wilson
A geochronologic framework for the Ziegler Reservoir fossil site, Snowmass Village, Colorado A geochronologic framework for the Ziegler Reservoir fossil site, Snowmass Village, Colorado
The Ziegler Reservoir fossil site near Snowmass Village, Colorado, provides a unique opportunity to reconstruct high-altitude paleoenvironmental conditions in the Rocky Mountains during the last interglacial period. We used four different techniques to establish a chronological framework for the site. Radiocarbon dating of lake organics, bone collagen, and shell carbonate, and in situ...
Authors
Shannon Mahan, Harrison Gray, Jeffrey S. Pigati, Jim Wilson, Nathaniel Lifton, James Paces, Maarten Blaauw
Science and Products
Filter Total Items: 13
No Result Found
Filter Total Items: 28
Guide to luminescence dating techniques and their application for paleoseismic research Guide to luminescence dating techniques and their application for paleoseismic research
Over the past 25 years, luminescence dating has become a key tool for dating sediments of interest in paleoseismic research. The data obtained from luminescence dating has been used to determine timing of fault displacement, calculate slip rates, and estimate earthquake recurrence intervals. The flexibility of luminescence is a key complement to other chronometers such as radiocarbon or...
Authors
Harrison Gray, Shannon Mahan, Tammy Rittenour, Michelle Nelson
Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone
Quantitative geomorphic analysis combined with cosmogenic nuclide 10Be-based geochronology and denudation rates have been used to further the understanding of the Quaternary landscape development of the Mecca Hills, a zone of transpressional uplift along the southern end of the San Andreas Fault, in southern California. The similar timing of convergent uplifts along the San Andreas Fault...
Authors
Harrison Gray, Lewis Owen, Craig Dietsch, Richard A. Beck, Marc Caffee, Robert B. Finkelman, Shannon Mahan
A high-elevation, multi-proxy biotic and environmental record of MIS 6-4 from the Ziegler Reservoir fossil site, Snowmass Village, Colorado, USA A high-elevation, multi-proxy biotic and environmental record of MIS 6-4 from the Ziegler Reservoir fossil site, Snowmass Village, Colorado, USA
In North America, terrestrial records of biodiversity and climate change that span Marine Oxygen Isotope Stage (MIS) 5 are rare. Where found, they provide insight into how the coupling of the ocean–atmosphere system is manifested in biotic and environmental records and how the biosphere responds to climate change. In 2010–2011, construction at Ziegler Reservoir near Snowmass Village...
Authors
Ian Miller, Jeffrey S. Pigati, R. Scott Anderson, Kirk Johnson, Shannon Mahan, Thomas Ager, Richard Baker, Maarten Blaauw, Jordon Bright, Peter Brown, Bruce Bryant, Zachary Calamari, Paul Carrara, Cherney Michael D., John Demboski, Scott Elias, Daniel C. Fisher, Harrison Gray, Danielle Haskett, Jeffrey S. Honke, Stephen T. Jackson, Gonzalo Jiménez-Moreno, Douglas Kline, Eric Leonard, Nathaniel Lifton, Carol Lucking, H. McDonald, Dane Miller, Daniel Muhs, Stephen Nash, Cody Newton, James Paces, Lesley Petrie, Mitchell Plummer, David Porinchu, Adam N. Rountrey, Eric Scott, Joseph Sertich, Saxon Sharpe, Gary Skipp, Laura Strickland, Richard Stucky, Robert Thompson, Jim Wilson
A geochronologic framework for the Ziegler Reservoir fossil site, Snowmass Village, Colorado A geochronologic framework for the Ziegler Reservoir fossil site, Snowmass Village, Colorado
The Ziegler Reservoir fossil site near Snowmass Village, Colorado, provides a unique opportunity to reconstruct high-altitude paleoenvironmental conditions in the Rocky Mountains during the last interglacial period. We used four different techniques to establish a chronological framework for the site. Radiocarbon dating of lake organics, bone collagen, and shell carbonate, and in situ...
Authors
Shannon Mahan, Harrison Gray, Jeffrey S. Pigati, Jim Wilson, Nathaniel Lifton, James Paces, Maarten Blaauw