Articles | Volume 4, issue 2
https://doi.org/10.5194/gchron-4-731-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-4-731-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
16 Dec 2022
Research article |
| 16 Dec 2022
| 16 Dec 2022
10Be age control of glaciation in the Beartooth Mountains, USA, from the latest Pleistocene through the Holocene
Department of Geology, Rowan University, Glassboro, NJ, USA
Elizabeth G. Ceperley
Department of Geoscience, University of Wisconsin – Madison, Madison, WI, USA
Claire Vavrus
Department of Geoscience, University of Wisconsin – Madison, Madison, WI, USA
Shaun A. Marcott
Department of Geoscience, University of Wisconsin – Madison, Madison, WI, USA
Jeremy D. Shakun
Department of Earth and Environmental Sciences, Boston College, Chestnut Hill, MA, USA
Marc W. Caffee
Department of Physics and Astronomy, Purdue University, West Lafayette, IN, USA
Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, USA
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Related subject area
Cosmogenic nuclide dating
Cosmogenic 21Ne exposure ages on late Pleistocene moraines in Lassen Volcanic National Park, California, USA
Technical note: Altitude scaling of 36Cl production from Fe
Production rate calibration for cosmogenic 10Be in pyroxene by applying a rapid fusion method to 10Be-saturated samples from the Transantarctic Mountains, Antarctica
Technical note: Optimizing the in situ cosmogenic 36Cl extraction and measurement workflow for geologic applications
Cosmogenic 3He chronology of postglacial lava flows at Mt Ruapehu, Aotearoa / New Zealand
Last ice sheet recession and landscape emergence above sea level in east-central Sweden, evaluated using in situ cosmogenic 14C from quartz
Regional beryllium-10 production rate for the mid-elevation mountainous regions in central Europe, deduced from a multi-method study of moraines and lake sediments in the Black Forest
Short communication: Cosmogenic noble gas depletion in soils by wildfire heating
Early Holocene ice retreat from Isle Royale in the Laurentian Great Lakes constrained with 10Be exposure-age dating
Technical note: Studying lithium metaborate fluxes and extraction protocols with a new, fully automated in situ cosmogenic 14C processing system at PRIME Lab
Cosmogenic 10Be in pyroxene: laboratory progress, production rate systematics, and application of the 10Be–3He nuclide pair in the Antarctic Dry Valleys
Technical note: A software framework for calculating compositionally dependent in situ 14C production rates
Constraining the aggradation mode of Pleistocene river deposits based on cosmogenic radionuclide depth profiling and numerical modelling
Technical note: Evaluating a geographical information system (GIS)-based approach for determining topographic shielding factors in cosmic-ray exposure dating
Combined linear-regression and Monte Carlo approach to modeling exposure age depth profiles
Cosmogenic nuclide weathering biases: corrections and potential for denudation and weathering rate measurements
Cosmogenic nuclide and solute flux data from central Cuban rivers emphasize the importance of both physical and chemical mass loss from tropical landscapes
Technical note: Accelerator mass spectrometry of 10Be and 26Al at low nuclide concentrations
Reconciling the apparent absence of a Last Glacial Maximum alpine glacial advance, Yukon Territory, Canada, through cosmogenic beryllium-10 and carbon-14 measurements
Cosmogenic ages indicate no MIS 2 refugia in the Alexander Archipelago, Alaska
In situ-produced cosmogenic krypton in zircon and its potential for Earth surface applications
Cosmogenic nuclide exposure age scatter records glacial history and processes in McMurdo Sound, Antarctica
Technical Note: Noble gas extraction procedure and performance of the Cologne Helix MC Plus multi-collector noble gas mass spectrometer for cosmogenic neon isotope analysis
Exposure dating of detrital magnetite using 3He enabled by microCT and calibration of the cosmogenic 3He production rate in magnetite
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Delayed and rapid deglaciation of alpine valleys in the Sawatch Range, southern Rocky Mountains, USA
Technical note: A prototype transparent-middle-layer data management and analysis infrastructure for cosmogenic-nuclide exposure dating
Isolation of quartz for cosmogenic in situ 14C analysis
Chlorine-36∕beryllium-10 burial dating of alluvial fan sediments associated with the Mission Creek strand of the San Andreas Fault system, California, USA
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Angus K. Moore and Darryl E. Granger
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Cosmogenic nuclide geochronology requires accurately scaling production rates with altitude. The energy spectrum of cosmic radiation changes with altitude, and reactions that are sensitive to different energies may have different scaling behavior. Here, we model the altitude scaling of 36Cl production from Fe and evaluate this model against calibration data. The data are broadly consistent with the prediction of larger-altitude scaling factors for 36Cl from Fe than for other reactions.
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Cosmogenic nuclides, such as 10Be, are rare isotopes produced in rocks when exposed at Earth's surface and are valuable for understanding surface processes and landscape evolution. However, 10Be is usually measured in quartz minerals. Here we present advances in efficiently extracting and measuring 10Be in the pyroxene mineral. These measurements expand the use of 10Be as a dating tool for new rock types and provide opportunities to understand landscape processes in areas that lack quartz.
Alia J. Lesnek, Joseph M. Licciardi, Alan J. Hidy, and Tyler S. Anderson
Geochronology, 6, 475–489, https://doi.org/10.5194/gchron-6-475-2024, https://doi.org/10.5194/gchron-6-475-2024, 2024
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We present an improved workflow for extracting and measuring chlorine isotopes in rocks and minerals. Experiments on seven geologic samples demonstrate that our workflow provides reliable results while offering several distinct advantages over traditional methods. Most notably, our workflow reduces the amount of isotopically enriched chlorine spike used per rock sample by up to 95 %, which will allow researchers to analyze more samples using their existing laboratory supplies.
Pedro Doll, Shaun Robert Eaves, Ben Matthew Kennedy, Pierre-Henri Blard, Alexander Robert Lee Nichols, Graham Sloan Leonard, Dougal Bruce Townsend, Jim William Cole, Chris Edward Conway, Sacha Baldwin, Gabriel Fénisse, Laurent Zimmermann, and Bouchaïb Tibari
Geochronology, 6, 365–395, https://doi.org/10.5194/gchron-6-365-2024, https://doi.org/10.5194/gchron-6-365-2024, 2024
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In this study, we use cosmogenic-sourced 3He to determine the eruption ages of 23 lava flows at Mt Ruapehu, Aotearoa New Zealand, and we show how this method can help overcome challenges associated with traditional dating methods in young lavas. Comparison with other methods demonstrates the accuracy of our data and the method's reliability. The new eruption ages allowed us to identify periods of quasi-simultaneous activity from different volcanic vents during the last 20 000 years.
Bradley W. Goodfellow, Arjen P. Stroeven, Nathaniel A. Lifton, Jakob Heyman, Alexander Lewerentz, Kristina Hippe, Jens-Ove Näslund, and Marc W. Caffee
Geochronology, 6, 291–302, https://doi.org/10.5194/gchron-6-291-2024, https://doi.org/10.5194/gchron-6-291-2024, 2024
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Carbon-14 produced in quartz (half-life of 5700 ± 30 years) provides a new tool to date exposure of bedrock surfaces. Samples from 10 exposed bedrock surfaces in east-central Sweden give dates consistent with the timing of both landscape emergence above sea level through postglacial rebound and retreat of the last ice sheet shown in previous reconstructions. Carbon-14 in quartz can therefore be used for dating in landscapes where isotopes with longer half-lives give complex exposure results.
Felix Martin Hofmann, Claire Rambeau, Lukas Gegg, Melanie Schulz, Martin Steiner, Alexander Fülling, Laëtitia Léanni, Frank Preusser, and ASTER Team
Geochronology, 6, 147–174, https://doi.org/10.5194/gchron-6-147-2024, https://doi.org/10.5194/gchron-6-147-2024, 2024
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We determined 10Be concentrations in moraine boulder surfaces in the southern Black Forest, SW Germany. We applied three independent dating methods to younger lake sediments. With the aid of independent age datasets, we calculated the growth of 10Be concentrations in moraine boulder surfaces.
Greg Balco, Alan J. Hidy, William T. Struble, and Joshua J. Roering
Geochronology, 6, 71–76, https://doi.org/10.5194/gchron-6-71-2024, https://doi.org/10.5194/gchron-6-71-2024, 2024
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We describe a new method of reconstructing the long-term, pre-observational frequency and/or intensity of wildfires in forested landscapes using trace concentrations of the noble gases helium and neon that are formed in soil mineral grains by cosmic-ray bombardment of the Earth's surface.
Eric W. Portenga, David J. Ullman, Lee B. Corbett, Paul R. Bierman, and Marc W. Caffee
Geochronology, 5, 413–431, https://doi.org/10.5194/gchron-5-413-2023, https://doi.org/10.5194/gchron-5-413-2023, 2023
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New exposure ages of glacial erratics on moraines on Isle Royale – the largest island in North America's Lake Superior – show that the Laurentide Ice Sheet did not retreat from the island nor the south shores of Lake Superior until the early Holocene, which is later than previously thought. These new ages unify regional ice retreat histories from the mainland, the Lake Superior lake-bottom stratigraphy, underwater moraines, and meltwater drainage pathways through the Laurentian Great Lakes.
Nathaniel Lifton, Jim Wilson, and Allie Koester
Geochronology, 5, 361–375, https://doi.org/10.5194/gchron-5-361-2023, https://doi.org/10.5194/gchron-5-361-2023, 2023
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We describe a new, fully automated extraction system for in situ 14C at PRIME Lab that incorporates more reliable components and designs than our original systems. We use a LiBO2 flux to dissolve a quartz sample in oxygen after removing contaminant 14C with a lower-temperature combustion step. Experiments with new Pt/Rh sample boats demonstrated reduced procedural blanks, and analyses of well-characterized intercomparison materials tested the effects of process variables on 14C yields.
Allie Balter-Kennedy, Joerg M. Schaefer, Roseanne Schwartz, Jennifer L. Lamp, Laura Penrose, Jennifer Middleton, Jean Hanley, Bouchaïb Tibari, Pierre-Henri Blard, Gisela Winckler, Alan J. Hidy, and Greg Balco
Geochronology, 5, 301–321, https://doi.org/10.5194/gchron-5-301-2023, https://doi.org/10.5194/gchron-5-301-2023, 2023
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Cosmogenic nuclides like 10Be are rare isotopes created in rocks exposed at the Earth’s surface and can be used to understand glacier histories and landscape evolution. 10Be is usually measured in the mineral quartz. Here, we show that 10Be can be reliably measured in the mineral pyroxene. We use the measurements to determine exposure ages and understand landscape processes in rocks from Antarctica that do not have quartz, expanding the use of this method to new rock types.
Alexandria J. Koester and Nathaniel A. Lifton
Geochronology, 5, 21–33, https://doi.org/10.5194/gchron-5-21-2023, https://doi.org/10.5194/gchron-5-21-2023, 2023
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In situ 14C’s short half-life (5.7 kyr) is unique among cosmogenic nuclides, making it sensitive to complex exposure and burial histories since 25 ka. Current extraction methods focus on quartz, but the ability to extract it from other minerals would expand applications. We developed MATLAB® scripts to calculate in situ 14C production rates from a broad range of mineral compositions. Results confirm O, Si, Al, and Mg as key targets but also find significant production from Na for the first time.
Nathan Vandermaelen, Koen Beerten, François Clapuyt, Marcus Christl, and Veerle Vanacker
Geochronology, 4, 713–730, https://doi.org/10.5194/gchron-4-713-2022, https://doi.org/10.5194/gchron-4-713-2022, 2022
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We constrained deposition phases of fluvial sediments (NE Belgium) over the last 1 Myr with analysis and modelling of rare isotopes accumulation within sediments, occurring as a function of time and inverse function of depth. They allowed the determination of three superposed deposition phases and intercalated non-deposition periods of ~ 40 kyr each. These phases correspond to 20 % of the sediment age, which highlights the importance of considering deposition phase when dating fluvial sediments.
Felix Martin Hofmann
Geochronology, 4, 691–712, https://doi.org/10.5194/gchron-4-691-2022, https://doi.org/10.5194/gchron-4-691-2022, 2022
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If topographical obstructions are present in the surroundings of sampling sites, exposure ages of rock surfaces need to be corrected. A toolbox for the ESRI ArcGIS software allows for quantifying topographic shielding with a digital elevation model, but it has only been validated with few field data. In this study, the output of the toolbox is evaluated with a more extensive dataset. If suitable elevation data are chosen, the toolbox provides a sound approach to determine topographic shielding.
Yiran Wang and Michael E. Oskin
Geochronology, 4, 533–549, https://doi.org/10.5194/gchron-4-533-2022, https://doi.org/10.5194/gchron-4-533-2022, 2022
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When first introduced together with the depth profile technique to determine the surface exposure age, the linear inversion approach has suffered with the drawbacks of not incorporating erosion and muons into calculation. In this paper, we increase the accuracy and applicability of the linear inversion approach by fully considering surface erosion, muogenic production, and radioactive decay, while maintaining its advantage of being straightforward to determine an exposure age.
Richard F. Ott, Sean F. Gallen, and Darryl E. Granger
Geochronology, 4, 455–470, https://doi.org/10.5194/gchron-4-455-2022, https://doi.org/10.5194/gchron-4-455-2022, 2022
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Cosmogenic nuclides are a tool to quantify denudation – the total removal of mass from near the Earth's surface. Chemical weathering can introduce biases to cosmogenic-nuclide-based denudation rates measurements. Here, we investigate the effects of weathering on cosmogenic nuclides and develop tools to correct for this influence. Our results highlight which additional measurements are required to determine accurate denudation rates in regions where weathering is not negligible.
Mae Kate Campbell, Paul R. Bierman, Amanda H. Schmidt, Rita Sibello Hernández, Alejandro García-Moya, Lee B. Corbett, Alan J. Hidy, Héctor Cartas Águila, Aniel Guillén Arruebarrena, Greg Balco, David Dethier, and Marc Caffee
Geochronology, 4, 435–453, https://doi.org/10.5194/gchron-4-435-2022, https://doi.org/10.5194/gchron-4-435-2022, 2022
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We used cosmogenic radionuclides in detrital river sediment to measure erosion rates of watersheds in central Cuba; erosion rates are lower than rock dissolution rates in lowland watersheds. Data from two different cosmogenic nuclides suggest that some basins may have a mixed layer deeper than is typically modeled and could have experienced significant burial after or during exposure. We conclude that significant mass loss may occur at depth through chemical weathering processes.
Klaus M. Wilcken, Alexandru T. Codilean, Réka-H. Fülöp, Steven Kotevski, Anna H. Rood, Dylan H. Rood, Alexander J. Seal, and Krista Simon
Geochronology, 4, 339–352, https://doi.org/10.5194/gchron-4-339-2022, https://doi.org/10.5194/gchron-4-339-2022, 2022
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Cosmogenic nuclides are now widely applied in the Earth sciences; however, more recent applications often push the analytical limits of the technique. Our study presents a comprehensive method for analysis of cosmogenic 10Be and 26Al samples down to isotope concentrations of a few thousand atoms per gram of sample, which opens the door to new and more varied applications of cosmogenic nuclide analysis.
Brent M. Goehring, Brian Menounos, Gerald Osborn, Adam Hawkins, and Brent Ward
Geochronology, 4, 311–322, https://doi.org/10.5194/gchron-4-311-2022, https://doi.org/10.5194/gchron-4-311-2022, 2022
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We explored surface exposure dating with two nuclides to date two sets of moraines from the Yukon Territory and explain the reasoning for the observed ages. Results suggest multiple processes, including preservation of nuclides from a prior exposure period, and later erosion of the moraines is required to explain the data. Our results only allow for the older moraines to date to Marine Isotope Stage 3 or 4 and the younger moraines to date to the very earliest Holocene.
Caleb K. Walcott, Jason P. Briner, James F. Baichtal, Alia J. Lesnek, and Joseph M. Licciardi
Geochronology, 4, 191–211, https://doi.org/10.5194/gchron-4-191-2022, https://doi.org/10.5194/gchron-4-191-2022, 2022
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We present a record of ice retreat from the northern Alexander Archipelago, Alaska. During the last ice age (~ 26 000–19 000 years ago), these islands were covered by the Cordilleran Ice Sheet. We tested whether islands were ice-free during the last ice age for human migrants moving from Asia to the Americas. We found that these islands became ice-free between ~ 15 100 years ago and ~ 16 000 years ago, and thus these islands were not suitable for human habitation during the last ice age.
Tibor János Dunai, Steven Andrew Binnie, and Axel Gerdes
Geochronology, 4, 65–85, https://doi.org/10.5194/gchron-4-65-2022, https://doi.org/10.5194/gchron-4-65-2022, 2022
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We develop in situ-produced terrestrial cosmogenic krypton as a new tool to date and quantify Earth surface processes, the motivation being the availability of six stable isotopes and one radioactive isotope (81Kr, half-life 229 kyr) and of an extremely weathering-resistant target mineral (zircon). We provide proof of principle that terrestrial Krit can be quantified and used to unravel Earth surface processes.
Andrew J. Christ, Paul R. Bierman, Jennifer L. Lamp, Joerg M. Schaefer, and Gisela Winckler
Geochronology, 3, 505–523, https://doi.org/10.5194/gchron-3-505-2021, https://doi.org/10.5194/gchron-3-505-2021, 2021
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Cosmogenic nuclide surface exposure dating is commonly used to constrain the timing of past glacier extents. However, Antarctic exposure age datasets are often scattered and difficult to interpret. We compile new and existing exposure ages of a glacial deposit with independently known age constraints and identify surface processes that increase or reduce the likelihood of exposure age scatter. Then we present new data for a previously unmapped and undated older deposit from the same region.
Benedikt Ritter, Andreas Vogt, and Tibor J. Dunai
Geochronology, 3, 421–431, https://doi.org/10.5194/gchron-3-421-2021, https://doi.org/10.5194/gchron-3-421-2021, 2021
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We describe the design and performance of a new noble gas mass laboratory dedicated to the development of and application to cosmogenic nuclides at the University of Cologne (Germany). At the core of the laboratory are a state-of-the-art high-mass-resolution multicollector Helix MCPlus (Thermo-Fisher) noble gas mass spectrometer and a novel custom-designed automated extraction line, including a laser-powered extraction furnace. Performance was tested with intercomparison (CREU-1) material.
Florian Hofmann, Emily H. G. Cooperdock, A. Joshua West, Dominic Hildebrandt, Kathrin Strößner, and Kenneth A. Farley
Geochronology, 3, 395–414, https://doi.org/10.5194/gchron-3-395-2021, https://doi.org/10.5194/gchron-3-395-2021, 2021
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We use microCT scanning to improve the quality of 3He exposure ages measured in detrital magnetite. We show that the presence of inclusions can significantly increase the measured amount of 3He and thereby the exposure age. By prescreening magnetite with microCT and analyzing only inclusion-free grains, this problem can be avoided. We also calibrate the cosmogenic 3He production rate in magnetite relative to 10Be in quartz, which can be used for similar studies in the future.
Travis Clow, Jane K. Willenbring, Mirjam Schaller, Joel D. Blum, Marcus Christl, Peter W. Kubik, and Friedhelm von Blanckenburg
Geochronology, 2, 411–423, https://doi.org/10.5194/gchron-2-411-2020, https://doi.org/10.5194/gchron-2-411-2020, 2020
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Meteoric beryllium-10 concentrations in soil profiles have great capacity to quantify Earth surface processes, such as erosion rates and landform ages. However, determining these requires an accurate estimate of the delivery rate of this isotope to local sites. Here, we present a new method to constrain the long-term delivery rate to an eroding western US site, compare it against existing delivery rate estimates (revealing considerable disagreement between methods), and suggest best practices.
Joseph P. Tulenko, William Caffee, Avriel D. Schweinsberg, Jason P. Briner, and Eric M. Leonard
Geochronology, 2, 245–255, https://doi.org/10.5194/gchron-2-245-2020, https://doi.org/10.5194/gchron-2-245-2020, 2020
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We investigate the timing and rate of retreat for three alpine glaciers in the southern Rocky Mountains to test whether they followed the pattern of global climate change or were majorly influenced by regional forcing mechanisms. We find that the latter is most likely for these glaciers. Our conclusions are based on a new 10Be chronology of alpine glacier retreat. We quantify retreat rates for each valley using the BACON program in R, which may be of interest for the audience of Geochronology.
Greg Balco
Geochronology, 2, 169–175, https://doi.org/10.5194/gchron-2-169-2020, https://doi.org/10.5194/gchron-2-169-2020, 2020
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Geologic dating methods generally do not directly measure ages. Instead, interpreting a geochemical measurement as an age requires a middle layer of calculations and supporting data, and the fact that this layer continually improves is an obstacle to synoptic analysis of geochronological data. This paper describes a prototype data management and analysis system that addresses this obstacle by making the middle-layer calculations transparent and dynamic to the user.
Keir A. Nichols and Brent M. Goehring
Geochronology, 1, 43–52, https://doi.org/10.5194/gchron-1-43-2019, https://doi.org/10.5194/gchron-1-43-2019, 2019
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We describe observations of anomalously high measurements of C-14 made from geologic material. We undertake a systematic investigation to identify the source of contamination, which we hypothesise is sourced from a commonly used method that is used prior to sample analysis. We find that the method does introduce modern carbon to samples and elevates C-14 measurements. We describe a standard procedure that effectively removes contamination from the aforementioned method.
Greg Balco, Kimberly Blisniuk, and Alan Hidy
Geochronology, 1, 1–16, https://doi.org/10.5194/gchron-1-1-2019, https://doi.org/10.5194/gchron-1-1-2019, 2019
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This article applies a new geochemical dating method to determine the age of sedimentary deposits useful in reconstructing slip rates on a major fault system.
Cited articles
Balco, G.: Contributions and unrealized potential contributions of
cosmogenic-nuclide exposure dating to glacier chronology, 1990–2010,
Quaternary Sci. Rev., 30, 3–27, https://doi.org/10.1016/j.quascirev.2010.11.003, 2011.
Balco, G., Stone, J. O., Lifton, N. A., and Dunai, T. J.: A complete and easily accessible means of calculating surface exposure ages or erosion rates from 10Be and 26Al measurements, Quat. Geochronol., 3, 174–195, https://doi.org/10.1016/j.quageo.2007.12.001, 2008.
Ballard, G. A.: Evidence to suggest catastrophic flooding of Clarks Fork of
the Yellowstone River, northeastern Wyoming (M.S.), University of Utah,
1976.
Barr, I. D. and Spagnolo, M.: Glacial cirques as palaeoenvironmental indicators: Their potential and limitations, Earth-Sci. Rev., 151, 48–78,
https://doi.org/10.1016/j.earscirev.2015.10.004, 2015.
Barth, A. M., Clark, P. U., Clark, J., Roe, G. H., Marcott, S. A., McCabe, A. M., Caffee, M. W., He, F., Cuzzone, J. K., and Dunlop, P.: Persistent millennial-scale glacier fluctuations in Ireland between 24 ka and 10 ka, Geology, 46, 151–154, https://doi.org/10.1130/G39796.1, 2018.
Barth, A. M., Ceperley, E. G., Vavrus, C., Marcott, S. A., Shakun, J. D., and Caffee, M. W.: Beryllium-10 surface exposure age data for moraines in the Beartooth Mountains, Montana, USA, PANGAEA, last access: 5 December 2022.
Bevan, A.: Summary of the Geology of the Beartooth Mountains, Montana,
J. Geol., 31, 441–465, https://doi.org/10.1086/623038, 1923.
Bolch, T.: Climate change and glacier retreat in northern Tien Shan
(Kazakhstan/Kyrgyzstan) using remote sensing data, Global Planet. Change, 56, 1–12, https://doi.org/10.1016/j.gloplacha.2006.07.009, 2007.
Braumann, S. M., Schaefer, J. M., Neuhuber, S. M., Reitner, J. M., Lüthgens, C., and Fiebig, M.: Holocene glacier change in the Silvretta Massif (Austrian Alps) constrained by a new 10Be chronology, historical records and modern observations, Quaternary Sci. Rev., 245, 106493,
https://doi.org/10.1016/j.quascirev.2020.106493, 2020.
Briner, J. P. and Porter, S. C.: Neoglaciation in the American Cordilleras, in: Encyclopedia of Quaternary Science, Elsevier, 1133–1142,
https://doi.org/10.1016/B0-444-52747-8/00137-X, 2018.
Catania, G. A., Stearns, L. A., Sutherland, D. A., Fried, M. J., Bartholomaus, T. C., Morlighem, M., Shroyer, E., and Nash, J.: Geometric Controls on Tidewater Glacier Retreat in Central Western Greenland, J. Geophys. Res.-Earth, 123, 2024–2038, https://doi.org/10.1029/2017JF004499, 2018.
Clark, P. U., Dyke, A. S., Shakun, J. D., Carlson, A. E., Clark, J., Wohlfarth, B., Mitrovica, J. X., Hostetler, S. W., and McCabe, A. M.: The Last Glacial Maximum, Science, 325, 710–714, https://doi.org/10.1126/science.1172873, 2009.
Corbett, L. B., Bierman, P. R., and Rood, D. H.: An approach for optimizing in situ cosmogenic 10Be sample preparation, Quat. Geochronol., 33, 24–34, https://doi.org/10.1016/j.quageo.2016.02.001, 2016.
Davis, P.: Holocene glacier fluctuations in the American Cordillera,
Quaternary Sci. Rev., 7, 129–157, https://doi.org/10.1016/0277-3791(88)90003-0, 1988.
Davis, P. T., Menounos, B., and Osborn, G.: Holocene and latest Pleistocene
alpine glacier fluctuations: a global perspective, Quaternary Sci. Rev., 28, 2021–2033, https://doi.org/10.1016/j.quascirev.2009.05.020, 2009.
Dowling, L., Eaves, S., Norton, K., Mackintosh, A., Anderson, B., Hidy, A.,
Lorrey, A., Vargo, L., Ryan, M., and Tims, S.: Local summer insolation and
greenhouse gas forcing drove warming and glacier retreat in New Zealand
during the Holocene, Quaternary Sci. Rev., 266, 107068.
https://doi.org/10.1016/j.quascirev.2021.107068, 2021.
Dunai, T. J.: Cosmogenic Nuclides: Principles, Concepts and Applications in
the Earth Surface Sciences, Cambridge University Press, United Kingdom, ISBN: 978-0-521-87380-2, 2010.
Giardino, J. R. and Vitek, J. D.: The significance of rock glaciers in the
glacial-periglacial landscape continuum, J. Quaternary Sci., 3, 97–103,
https://doi.org/10.1002/jqs.3390030111, 1988.
Gillespie, A. R. and Bierman, P. R.: Precision of terrestrial exposure ages and erosion rates estimated from analysis of cosmogenic isotopes produced in situ, J. Geophys. Res., 100, 24637–24649,
https://doi.org/10.1029/95JB02911, 1995.
Gosse, J. C. and Phillips, F. M.: Terrestrial in situ cosmogenic nuclides: theory and application, Quaternary Sci. Rev., 20, 1475–1560, 2001.
Gosse, J. C., Evenson, E. B., Klein, J., Lawn, B., and Middleton, R.:
Precise cosmogenic 10Be measurements in western North America: Support for a global Younger Dryas cooling event, Geology, 23, 877–880, 1995.
Graf, W. L.: Quantitative Analysis of Pinedale Landforms, Beartooth
Mountains, Montana and Wyoming, Arctic Alpine Res., 3, 253–261,
https://doi.org/10.2307/1550197, 1971.
Hugonnet, R., McNabb, R., Berthier, E., Menounos, B., Nuth, C., Girod, L.,
Farinotti, D., Huss, M., Dussaillant, I., Brun, F., and Kääb, A.:
Accelerated global glacier mass loss in the early twenty-first century,
Nature, 592, 726–731, https://doi.org/10.1038/s41586-021-03436-z, 2021.
Knight, J., Harrison, S., and Jones, D. B.: Rock glaciers and the
geomorphological evolution of deglacierizing mountains, Geomorphology, 324,
14–24, https://doi.org/10.1016/j.geomorph.2018.09.020, 2019.
Kohl, C. P. and Nishiizumi, K.: Chemical isolation of quartz for measurement of in-situ-produced cosmogenic nuclides, Geochim. Cosmochim. Ac., 56, 3583–3587, 1992.
Laabs, B. J. C., Licciardi, J. M., Leonard, E. M., Munroe, J. S., and Marchetti, D. W.: Updated cosmogenic chronologies of Pleistocene mountain glaciation in the western United States and associated paleoclimate inferences, Quaternary Sci. Rev., 242, 106427, https://doi.org/10.1016/j.quascirev.2020.106427, 2020.
Licciardi, J.: Alpine Glacier and Pluvial Lake Records of Late Pleistocene
Climate Variability in the Western United States, Dissertation, Oregon
State University, 2000.
Licciardi, J. M. and Pierce, K. L.: Cosmogenic exposure-age chronologies of
Pinedale and Bull Lake glaciations in greater Yellowstone and the Teton
Range, USA, Quaternary Sci. Rev., 27, 814–831, https://doi.org/10.1016/j.quascirev.2007.12.005, 2008.
Licciardi, J. M. and Pierce, K. L.: History and dynamics of the Greater
Yellowstone Glacial System during the last two glaciations, Quaternary Sci. Rev., 200, 1–33, https://doi.org/10.1016/j.quascirev.2018.08.027, 2018.
Lifton, N., Sato, T., and Dunai, T. J.: Scaling in situ cosmogenic nuclide
production rates using analytical approximations to atmospheric cosmic-ray
fluxes, Earth Planet. Sc. Lett., 386, 149–160, https://doi.org/10.1016/j.epsl.2013.10.052, 2014.
Lifton, N., Caffee, M., Finkel, R., Marrero, S., Nishiizumi, K., Phillips,
F. M., Goehring, B., Gosse, J., Stone, J., Schaefer, J., Theriault, B., Jull, A. J. T., and Fifield, K.: In situ cosmogenic nuclide production rate calibration for the CRONUS-Earth project from Lake Bonneville, Utah, shoreline features, Quat. Geochronol., 26, 56–69, https://doi.org/10.1016/j.quageo.2014.11.002, 2015.
Loomis, S. E., Russell, J. M., Verschuren, D., Morrill, C., De Cort, G.,
Sinninghe Damsté, J. S., Olago, D., Eggermont, H., Street-Perrott, F. A., and Kelly, M. A.: The tropical lapse rate steepened during the Last Glacial Maximum, Sci. Adv., 3, e1600815, https://doi.org/10.1126/sciadv.1600815, 2017.
Lora, J. M. and Ibarra, D. E.: The North American hydrologic cycle through the last deglaciation, Quaternary Sci. Rev., 226, 105991,
https://doi.org/10.1016/j.quascirev.2019.105991, 2019.
Lora, J. M., Mitchell, J. L., Risi, C., and Tripati, A. E.: North Pacific
atmospheric rivers and their influence on western North America at the Last
Glacial Maximum, Geophys. Res. Lett., 44, 1051–1059, https://doi.org/10.1002/2016GL071541, 2017.
Manabe, S. and Broccoli, A. J.: The influence of continental ice sheets on the climate of an ice age, J. Geophys. Res., 90, 2167–2190,
https://doi.org/10.1029/JD090iD01p02167, 1985.
Marcott, S. A.: Late Pleistocene and Holocene Glacier and Climate Change,
PhD dissertation, Oregon State University, 281 pp., https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/3484zm26f (lats access: 5 December 2022), 2011.
Marcott, S. A., Shakun, J. D., Clark, P. U., and Mix, A. C.: A reconstruction of regional and global temperature for the past 11,300 years, Science, 339, 1198–1201, https://doi.org/10.1126/science.1228026, 2013.
Marcott, S. A., Bauska, T. K., Buizert, C., Steig, E. J., Rosen, J. L., Cuffey, K. M., Fudge, T. J., Severinghaus, J. P., Ahn, J., Kalk, M. L., McConnell, J. R., Sowers, T., Taylor, K. C., White, J. W., and Brook, E. J.: Centennial-scale changes in the global carbon cycle during the last deglaciation, Nature, 514, 616–619, https://doi.org/10.1038/nature13799, 2014.
Marcott, S. A., Clark, P. U., Shakun, J. D., Brook, E. J., Davis, P. T., and Caffee, M. W.: 10Be age constraints on latest Pleistocene and Holocene cirque glaciation across the western United States, npj Clim. Atmos. Sci., 2, 5, https://doi.org/10.1038/s41612-019-0062-z. 2019.
McKay, N. P., Kaufman, D. S., Routson, C. C., Erb, M. P., and Zander, P. D.: The Onset and Rate of Holocene Neoglacial Cooling in the Arctic, Geophys. Res. Lett., 45, 12487–12496, https://doi.org/10.1029/2018GL079773, 2018.
Mix, A. C., Lund, D. C., Pisias, N. G., Bodén, P., Bornmalm, L., Lyle, M., and Pike, J.: Rapid climate oscillations in the Northeast Pacific during the last deglaciation reflect Northern and Southern Hemisphere sources, in: Rapid Climate Oscillations in the Northeast Pacific during the Last Deglaciation Reflect Northern and Southern Hemisphere Sources, AGU
Monograph, American Geophysical Union, Washington, D.C., 127–148, 1999.
Montgomery, C. W. and Lytwyn, J. N.: Rb-Sr Systematics and Ages of Principal Precambrian Lithologies in the South Snowy Block, Beartooth Mountains, J. Geol., 92, 103–112, https://doi.org/10.1086/628837, 1984.
Munroe, J. S., Crocker, T. A., Giesche, A. M., Rahlson, L. E., Duran, L. T., Bigl, M. F., and Laabs, B. J. C.: A lacustrine-based Neoglacial record for Glacier National Park, Montana, USA, Quaternary Sci. Rev., 53, 39–54,
https://doi.org/10.1016/j.quascirev.2012.08.005, 2012.
Nishiizumi, K., Imamura, M., Caffee, M. W., Southon, J. R., Finkel, R. C.,
and McAninch, J.: Absolute calibration of 10Be AMS standards, Nucl. Instrum. Meth. B, 258, 403–413, https://doi.org/10.1016/j.nimb.2007.01.297, 2007.
Osman, M. B., Tierney, J. E., Zhu, J., Tardif, R., Hakim, G. J., King, J.,
and Poulsen, C. J.: Globally resolved surface temperatures since the Last Glacial Maximum, Nature, 599, 239–244, https://doi.org/10.1038/s41586-021-03984-4,
2021.
Petersen, E. I., Levy, J. S., Holt, J. W., and Stuurman, C. M.: New insights into ice accumulation at Galena Creek Rock Glacier from radar imaging of its internal structure, J. Glaciol., 66, 1–10,
https://doi.org/10.1017/jog.2019.67, 2020.
Porter, S. C. and Denton, G. H.: Chronology of neoglaciation in the North
American Cordillera, Am. J. Sci., 265, 177–210, 1967.
Praetorius, S. K., Mix, A. C., Walczak, M. H., Wolhowe, M. D., Addison, J. A., and Prahl, F. G.: North Pacific deglacial hypoxic events linked to abrupt ocean warming, Nature, 527, 362–366, https://doi.org/10.1038/nature15753, 2015.
Praetorius, S. K., Condron, A., Mix, A. C., Walczak, M. H., McKay, J. L., and Du, J.: The role of Northeast Pacific meltwater events in deglacial climate change, Sci. Adv., 6, eaay2915, https://doi.org/10.1126/sciadv.aay2915,
2020.
Putkonen, J., Connolly, J., and Orloff, T.: Landscape evolution degrades the geologic signature of past glaciations, Geomorphology, 97, 208–217,
https://doi.org/10.1016/j.geomorph.2007.02.043, 2008.
Reyes, A. V., Wiles, G. C., Smith, D. J., Barclay, D. J., Allen, S., Jackson, S., Larocque, S., Laxton, S., Lewis, D., Calkin, P. E., and Clague, J. J.: Expansion of alpine glaciers in Pacific North America in the first millennium A.D., Geology, 34, 57–60, https://doi.org/10.1130/G21902.1, 2006.
Shakun, J. D., Clark, P. U., He, F., Lifton, N. A., Liu, Z., and Otto-Bliesner, B. L.: Regional and global forcing of glacier retreat during the last deglaciation, Nat. Commun., 6, 8059, https://doi.org/10.1038/ncomms9059, 2015.
Solomina, O. N., Bradley, R. S., Hodgson, D. A., Ivy-Ochs, S., Jomelli, V.,
Mackintosh, A. N., Nesje, A., Owen, L. A., Wanner, H., Wiles, G. C., and Young, N. E.: Holocene glacier fluctuations, Quaternary Sci. Rev., 111, 9–34, https://doi.org/10.1016/j.quascirev.2014.11.018, 2015.
Solomina, O. N., Bradley, R. S., Jomelli, V., Geirsdottir, A., Kaufman, D. S., Koch, J., McKay, N. P., Masiokas, M., Miller, G., Nesje, A., Nicolussi, K., Owen, L. A., Putnam, A. E., Wanner, H., Wiles, G., and Yang, B.: Glacier
fluctuations during the past 2000 years, Quaternary Sci. Rev., 149,
61–90, https://doi.org/10.1016/j.quascirev.2016.04.008, 2016.
Sortor, R. N.: Glacial chronologies of western North American mountain ranges from cosmogenic nuclide dating, PhD dissertation, Tulane University, 2022.
Trouet, V., Diaz, H. F., Wahl, E. R., Viau, A. E., Graham, R., Graham, N., and Cook, E. R.: A 1500-year reconstruction of annual mean temperature for temperate North America on decadal-to-multidecadal time scales, Environ. Res. Lett., 8, 024008, https://doi.org/10.1088/1748-9326/8/2/024008, 2013.
Vacco, D. A., Clark, P. U., Mix, A. C., Cheng, H., and Edwards, R. L.: A speleothem record of Younger Dryas cooling, Klamath Mountains, Oregon, USA, Quaternary Res., 64, 249–256, 2005.
Van Gosen, B. S., Elliot, J. E., LaRock, E. J., du Bray, E. A., Carlson, R. R., and Zientek, M. L.: Generalized geologic map of the Absaroka-Beartooth study area, south-central Montana, Miscellaneous Field Studies Map 2338, https://doi.org/10.3133/mf2338, 2000.
Viau, A. E., Ladd, M., and Gajewski, K.: The climate of North America during the past 2000 years reconstructed from pollen data, Global Planet. Change, 84–85, 75–83, https://doi.org/10.1016/j.gloplacha.2011.09.010, 2012.
Young, N. E., Briner, J. P., Leonard, E. M., Licciardi, J. M., and Lee, K.:
Assessing climatic and nonclimatic forcing of Pinedale glaciation and
deglaciation in the western United States, Geology, 39, 171–174,
https://doi.org/10.1130/g31527.1, 2011.
Zhang, E., Chang, J., Shulmeister, J., Langdon, P., Sun, W., Cao, Y., Yang,
X., and Shen, J.: Summer temperature fluctuations in Southwestern China during the end of the LGM and the last deglaciation, Earth Planet. Sc. Lett., 509, 78–87, https://doi.org/10.1016/j.epsl.2018.12.024, 2019.
Short summary
Deposits left behind by past glacial activity provide insight into the previous size and behavior of glaciers and act as another line of evidence for past climate. Here we present new age control for glacial deposits in the mountains of Montana and Wyoming, United States. While some deposits indicate glacial activity within the last 2000 years, others are shown to be older than previously thought, thus redefining the extent of regional Holocene glaciation.
Deposits left behind by past glacial activity provide insight into the previous size and...
