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Surface exposure dating is a collection of geochronological techniques for estimating the length of time that a rock has been exposed at or near Earth's surface. Surface exposure dating is used to date glacial advances and retreats, erosion history, lava flows, meteorite impacts, rock slides, fault scarps, cave development, and other geological events.
A series of related techniques for determining the age at which a geomorphic surface was created (exposure dating), or at which formerly surficial materials were buried (burial dating). [10] Exposure dating uses the concentration of exotic nuclides (e.g. 10 Be, 26 Al, 36 Cl) produced by cosmic rays interacting with Earth materials as a proxy ...
Quaternary Geochronology is a peer-reviewed scientific journal addressing methods and results in the dating of samples from the Quaternary Period.. The journal's scope covers the principles of geochronological methods, their analytical procedures, and instrumentation, such as Luminescence dating, [1] Tephrochronology, [2] or Surface exposure dating. [3]
Surface exposure dating using the isotope 36 Cl was the primary means of dating boulders and terminal moraines in the Drangajökull area in Iceland. [3] Ages of erratic boulders found near the Leirufjörður valley and moraine range from 7-12 thousand years old. [3]
The map lichen (Rhizocarpon geographicum), the lichen most used in lichenometry. Lichenometry can provide dates for glacial deposits in tundra environments, lake level changes, glacial moraines, trim lines, palaeofloods, [9] rockfalls, seismic events associated with the rockfalls, [2] talus stabilization and former extent of permafrost or very persistent snow cover. [10]
Most luminescence dating methods rely on the assumption that the mineral grains were sufficiently "bleached" at the time of the event being dated. For example, in quartz a short daylight exposure in the range of 1–100 s before burial is sufficient to effectively “reset” the OSL dating clock.
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Surface exposure dating This page was last edited on 10 September 2016, at 06:35 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...