A principle that states that geologic processes that occurred in the past can be explained by current geologic processes.

The age of an object in relation to the ages of other objects.

The type of rock that you will find most types of fossils in.

The principle that states that younger rock layers are found on top of older rock layers.

The principle that states that sedimentary rock, if left undisturbed, will remain horizontal.

A break in the geologic record created when rock layers are eroded or when sediments are not deposited for longer periods of time.

The principle that states a fault or body of rock is younger than any body of rock that it cuts through.

The numeric age of an object or event established by an absolute dating process.

where magma cut through other rock layers underground

Which layer in the image is the oldest?

Which is younger: B or E?

What is layer D called?

Which is older; A or D?