Traces of nuclear weapons testing and accidents like Chernobyl have been found in glaciers around the world. It is unknown if they pose a risk to health
Source:
https://www.newscientist.com/article/2200752-glaciers-contain-radioactive-isotopes-from-nuclear-tests-and-accidents/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home