Beryllium 10 dating
Their work was published in 2016 in GSA Today, the journal of the Geological Society of America.Beryllium dating is used to estimate the time a rock has been exposed on the surface of the Earth, as well as erosion and sedimentation rates. Like carbon-14, most of it is formed in the earth’s upper atmosphere.Particles from incoming cosmic rays (high-energy radiation from outer space) begin to hit these boulder surfaces, creating beryllium-10.
The creation occurs within minerals the upper meter of rocks exposed directly to the sky.
Beryllium has long been a topic of interest to researchers who have examined its harmful effects on health in people who are exposed to the metal on a daily basis for long periods of time.
However, this risk does not apply to people in the general population who do not actually handle beryllium, Pepper said."Beryllium becomes harmful when it is generated into an airborne particulate …
Cosmogenic nuclide dating is often used to determine the dates of important geological events, such as glacier advances and retreats, rock slides, meteor impacts and lava flows.
For example, after a rock avalanche, boulders that land on top of the heap have surfaces that are exposed to the sky for the first time.