Charts showing the relation between isotope ratio and time
By Geosciences and Environmental Change Science Center
2015 (approx.)
![Charts showing the relation between isotope ratio and time](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/u_charts.png?itok=gQEjewy5)
Detailed Description
We can date corals with two uranium-series clocks: The ratio of 230Th/234U as well as the ratio of 234U/238U in a sample can tell us the age in years of the sample.