How to Date Nothing With Cosmogenic Nuclides
نویسندگان
چکیده
منابع مشابه
Cosmogenic nuclides, topography, and the spatial variation of soil depth
If the rate of bedrock conversion to a mobile layer of soil depends on the local thickness of soil, then hillslopes on uniform bedrock in a landscape approaching dynamic equilibrium should be mantled by a uniform thickness of soil. Conversely, if the depth of soil varies across an actively eroding landscape, then rates of soil production will also vary and, consequently the landscape will not b...
متن کاملTerrestrial in situ cosmogenic nuclides: theory and application
The cosmogenic nuclide exposure history method is undergoing major developments in analytical, theoretical, and applied areas. The capability to routinely measure low concentrations of stable and radioactive cosmogenic nuclides has led to new methods for addressing long-standing geologic questions and has provided insights into rates and styles of sur"cial processes. The di!erent physical and c...
متن کاملApplications of cosmogenic nuclides to Laurentide Ice Sheet history and dynamics
Ice sheets play a fundamental role within Earth’s climate system and in shaping landscapes. Despite extensive research, the maximum extent and basal dynamics of the Laurentide Ice Sheet (LIS) during the last glacial cycle remain elusive and debated in many areas. Recently, cosmogenic nuclides (e.g., 36Cl, 26Al, 10Be) have played an important role in improving our understanding of LIS extent and...
متن کاملDating sediment burial with in situ-produced cosmogenic nuclides: theory, techniques, and limitations
Dating sediment burial over million-year time scales is crucial in many areas of the Earth sciences and archeology, but is often difficult using traditional techniques. Sediment burial can be dated by the radioactive decay of cosmogenic nuclides, provided that the sediment was exposed to cosmic rays prior to burial. Dating calculations are straightforward if sediment is buried deeply and rapidl...
متن کاملChapter 4: Principles of Exposure Age Determination Using Terrestrial in Situ Produced Cosmogenic Nuclides
After the discovery of the cosmic radiation in the 1910’s, Grosse (1934) was the first who suggested that the cosmic radiation could produce radioactive nuclides at the surface of the Earth. The next step towards the utilisation of cosmogenic nuclides in earth sciences was the discovery of Libby (Libby et al. 1949) in the late 1940s: during its interaction with the atmosphere, cosmic radiation ...
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ژورنال
عنوان ژورنال: Acta Carsologica
سال: 2007
ISSN: 0583-6050
DOI: 10.3986/ac.v36i1.212