Abstract
The determination of a rock's surface exposure time using concentrations of cosmic-ray-produced ('cosmogenic') nuclides is a relatively new and sometimes the only dating method for various geomorphic features. We have employed this technique to determine eruption ages of young lava flows from the Central Volcanic Zone (CVZ) in Northern Chile (23~176 and the chronology of a group of superimposing Quaternary landslides at Sierra Laguna Blanca, Argentina (67~ 26.5~ using the noble gas isotopes 3He and 21Ne.
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