Which is an application of the principle of uniformitarianism?

A.
examining a rock to find out what minerals are in the rock

B.
studying a modern river valley to learn about how ancient rock layers formed

C.
counting tree rings to determine the age of a tree

D.
ordering a group of fossils from largest to smallest

Question

Which is an application of the principle of uniformitarianism?
 
 A.
examining a rock to find out what minerals are in the rock
 
 B.
studying a modern river valley to learn about how ancient rock layers formed
 
 C.
counting tree rings to determine the age of a tree
 
 D.
ordering a group of fossils from largest to smallest

anonymous · Answer

This is a hard question, it can be summarized as,"the present is the key to the past". 

i'm thinking A or B, but i'm not 100% sure though

destro · Answer

thank you