text: Because cosmogenic isotopes have long half-lives (anywhere from thousands to millions of years), scientists find them useful for geologic dating.  Cosmogenic isotopes are produced at or near the surface of the Earth, and thus are commonly applied to problems of measuring ages and rates of geomorphic and sedimentary events and processes.
  Specific applications of cosmogenic isotopes include:
  * exposure dating of earth surfaces, including glacially scoured bedrock, fault scarps, landslide debris
  * burial dating of sediment, bedrock, ice
  * measurement of steady-state erosion rates
  * absolute dating of organic matter (radiocarbon dating)
  * absolute dating of water masses, measurement of groundwater transport rates
  * absolute dating of meteorites, lunar surfaces