Micah lives near some small cliffs. One day, he finds a fossil in a layer of sedimentary rock. He does not know what kind of fossil it is or how old it is. He wants to know more about the fossil.
How can Micah best estimate how old the fossil is?
O A. Compare the fossil to organisms alive today and identify differences.
OB. Observe the characteristics of the fossil and other fossils in the same rock layer.
O C. Calculate how long it would take geologic processes to form the rock layer with the fossil.
O D. Compare the position of the fossil with the positions of any surrounding rock layers that have known ages.