Results 251 to 260 of about 10,767 (294)

Accurate surface exposure dating with lichens [PDF]

Quaternary Research, 2018
AbstractLichenometry accurately dates exposure times of glacial moraines and landslides when measuring the longest axis of the largest crustose lichen on many blocks, as demonstrated by numerous examples. In Sweden, the sizes ofRhizocarponsubgenusRhizocarpondescribe five pulses of glacial moraine creation in 120 yr. Six historic California earthquakes,
William B. Bull
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Chronology of glaciations in the Sierra Nevada, California, from 10Be surface exposure dating

Quaternary Science Reviews, 2011
Abstract We use 10Be surface exposure dating to construct a high-resolution chronology of glacial fluctuations in the Sierra Nevada, California. Most previous studies focused on individual glaciated valleys, whereas our study compares chronologies developed throughout the range to identify regional patterns in the timing of glacier response to major ...
Douglas Burbank, Dylan Rood, Robert C Finkel   +2 more
exaly   +2 more sources

Testing new kinetic models and calibration methods for Rock Surface Luminescence Exposure dating using controlled experiments [PDF]

Radiation Measurements, 2023
Rock surface luminescence exposure dating (RSLED) is an evolving tool in dating prehistoric rock surfaces. In this study, we explore and compare current and new models and calibration methods using optically stimulated luminescence (OSL) depth profiles ...
Andrew Murray, Trine Freiesleben
exaly   +2 more sources

Investigation of OSL surface exposure dating to reconstruct post-LIA glacier fluctuations in the French Alps (Mer de Glace, Mont Blanc massif) [PDF]

Quaternary Geochronology, 2018
Providing quantitative constraints on late Pleistocene glacier fluctuations remains an important challenge for understanding glacier response to past and future climate changes.
Pierre Valla, Frédéric Herman, Benjamin Lehmann   +2 more
exaly   +3 more sources

In Situ Radiometric and Exposure Age Dating of the Martian Surface

Science, 2014
We determined radiogenic and cosmogenic noble gases in a mudstone on the floor of Gale Crater. A K-Ar age of 4.21 ± 0.35 billion years represents a mixture of detrital and authigenic components and confirms the expected antiquity of rocks comprising the crater rim. Cosmic-ray–produced 3 He, 21
K. A. Farley, C. Malespin, P. Mahaffy, J. P. Grotzinger, P. M. Vasconcelos, R. E. Milliken, M. Malin, K. S. Edgett, A. A. Pavlov, J. A. Hurowitz, J. A. Grant, H. B. Miller, R. Arvidson, L. Beegle, F. Calef, P. G. Conrad, W. E. Dietrich, J. Eigenbrode, R. Gellert, S. Gupta, V. Hamilton, D. M. Hassler, K.W. Lewis, S. M. McLennan, D. Ming, R. Navarro-González, S. P. Schwenzer, A. Steele, E. M. Stolper, D. Y. Sumner, D. Vaniman, A. Vasavada, K. Williford, R. F. Wimmer-Schweingruber, David F. Blake, Thomas Bristow, David DesMarais, Laurence Edwards, Robert Haberle, Tori Hoehler, Jeff Hollingsworth, Melinda Kahre, Leslie Keely, Christopher McKay, Mary Beth Wilhelm, Lora Bleacher, William Brinckerhoff, David Choi, Jason P. Dworkin, Melissa Floyd, Caroline Freissinet, James Garvin, Daniel Glavin, Daniel Harpold, David K. Martin, Amy McAdam, Eric Raaen, Michael D. Smith, Jennifer Stern, Florence Tan, Melissa Trainer, Michael Meyer, Arik Posner, Mary Voytek, Robert C. Anderson, Andrew Aubrey, Alberto Behar, Diana Blaney, David Brinza, Lance Christensen, Joy A. Crisp, Lauren DeFlores, Jason Feldman, Sabrina Feldman, Gregory Flesch, Joel Hurowitz, Insoo Jun, Didier Keymeulen, Justin Maki, Michael Mischna, John Michael Morookian, Timothy Parker, Betina Pavri, Marcel Schoppers, Aaron Sengstacken, John J. Simmonds, Nicole Spanovich, Manuel de la Torre Juarez, Christopher R. Webster, Albert Yen, Paul Douglas Archer, Francis Cucinotta, John H. Jones, Richard V. Morris, Paul Niles, Elizabeth Rampe, Thomas Nolan, Martin Fisk, Leon Radziemski, Bruce Barraclough, Steve Bender, Daniel Berman, Eldar Noe Dobrea, Robert Tokar, Rebecca M. E. Williams, Aileen Yingst, Laurie Leshin, Timothy Cleghorn, Wesley Huntress, Gérard Manhès, Judy Hudgins, Timothy Olson, Noel Stewart, Philippe Sarrazin, Edward Vicenzi, Sharon A. Wilson, Mark Bullock, Bent Ehresmann, Joseph Peterson, Scot Rafkin, Cary Zeitlin, Fedor Fedosov, Dmitry Golovin, Natalya Karpushkina, Alexander Kozyrev, Maxim Litvak, Alexey Malakhov, Igor Mitrofanov, Maxim Mokrousov, Sergey Nikiforov, Vasily Prokhorov, Anton Sanin, Vladislav Tretyakov, Alexey Varenikov, Andrey Vostrukhin, Ruslan Kuzmin, Benton Clark, Michael Wolff, Oliver Botta, Darrell Drake, Keri Bean, Mark Lemmon, Ryan B. Anderson, Kenneth Herkenhoff, Ella Mae Lee, Robert Sucharski, Miguel Ángel de Pablo Hernández, Juan José Blanco Ávalos, Miguel Ramos, Myung-Hee Kim, Ianik Plante, Jan-Peter Muller, Ryan Ewing, William Boynton, Robert Downs, Mike Fitzgibbon, Karl Harshman, Shaunna Morrison, Onno Kortmann, Marisa Palucis, Amy Williams, Günter Lugmair, Michael A. Wilson, David Rubin, Bruce Jakosky, Tonci Balic-Zunic, Jens Frydenvang, Jaqueline Kløvgaard Jensen, Kjartan Kinch, Asmus Koefoed, Morten Bo Madsen, Susan Louise Svane Stipp, Nick Boyd, John L. Campbell, Glynis Perrett, Irina Pradler, Scott VanBommel, Samantha Jacob, Tobias Owen, Scott Rowland, Hannu Savijärvi, Eckart Boehm, Stephan Böttcher, Sönke Burmeister, Jingnan Guo, Jan Köhler, César Martín García, Reinhold Mueller-Mellin, John C. Bridges, Timothy McConnochie, Mehdi Benna, Heather Franz, Hannah Bower, Anna Brunner, Hannah Blau, Thomas Boucher, Marco Carmosino, Sushil Atreya, Harvey Elliott, Douglas Halleaux, John E. Moores   +200 more
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Testing the effects of aspect and total insolation on luminescence depth profiles for rock surface exposure dating [PDF]

Radiation Measurements, 2022
Using luminescence to date the burial and exposure ages of rock surfaces has been a revolutionary new geochronological approach developed and refined over the past decade. Rock surface exposure dating is based on the principle that the depth to which the
Friedrich Obleitner, Stephan Fuhrmann
exaly   +1 more source

SURFACE EXPOSURE DATING: REVIEW AND CRITICAL EVALUATION

Physical Geography, 1991
The past decade has seen the development and application of over a dozen new methods for quantitative age-determinations of geomorphic surfaces. Some surface exposure dating methods are numerical, including the accumulation of cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, and 41Ca, accumulation of cosmogenic stable nuclides 3He and 21Ne, 14C dating ...
Ronald I. Dorn, Fred M. Phillips
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Surface exposure dating of the Flims landslide, Graubünden, Switzerland

Geomorphology, 2009
Abstract Sixteen boulder and bedrock surfaces related to the Flims landslide (volume 8–12 km3) were dated with 36Cl and 10Be. Exposure ages range from 4900 ± 250 yr to 15,440 ± 1480 yr, including corrections made due to snow cover and karst erosion.
S. Ivy-Ochs, A.v. Poschinger, H.-A. Synal, M. Maisch   +3 more
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The Accumulation of Cosmogenic Chlorine-36 in Rocks: a Method for Surface Exposure Dating

Science, 1986
Because of the reaction of cosmic rays with elements in minerals, chlorine-36 accumulates in rocks exposed at the earth's surface. This suggests that the ratio of chlorine-36 to stable chloride can be used as a geochronometer. Reasonable agreement has been obtained between measurements of chlorine-36 in volcanic rocks of known age and ...
F M, Phillips, B D, Leavy, N O, Jannik, D, Elmore, P W, Kubik   +4 more
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Diffusion of cosmogenic3He in olivine and quartz: implications for surface exposure dating

Earth and Planetary Science Letters, 1991
Abstract Thein situ production of3He in surface rocks by cosmic ray induced nuclear reactions offers an important geochronological tool. To evaluate helium loss problems in this technique, cosmogenic3He diffusivities were measured in quartz and olivine by incremental heating at 150–600°C.
T.W. Trull, M.D. Kurz, W.J. Jenkins
openaire   +1 more source