How is radioactive decay used to date sedimentary rocks? The amounts of potassium and argon in sedimentary rocks are measured. The amounts of carbon-14 and nitrogen in sedimentary rocks are measured. The amounts of unstable elements in each layer of the sedimentary rocks are compared. The amounts of unstable elements in the volcanic layers above and below the sedimentary layers are measured.
How is radioactive decay used to date sedimentary rocks? ... The amounts of unstable elements in the volcanic layers above and below the sedimentary layers are measured. The graph shows calculations for potassium-argon dating.
