Geologic Time Scale

Front

What is an index fossil?

Back

A fossil that is useful for dating and correlating the strata in which it is found.

Front

Which rock strata is the youngest?

Back

E

Front

Which rock strata is the oldest?

Back

B

Front

Which relative rock dating law(s) are shown in the image?

Back

Law of superposition and crosscutting.

Front

Putting laundry in the basket over time best illustrates which rocking dating law?

Back

Law of superposition.

Front

What is the principle that states Earth's processes occurring today are similar to those that occurred in the past?

Back

Uniformitarianism

Front

Relative rock dating...

Back

compares the age of surrounding rock layers.

Front

What is an unfonformity in rock strata?

Back

a missing interval in the strata record, an interruption in rock strata by weather and erosion, an interruption in rock strata by earthquakes or magma.

Front

Dinosaurs and early human ancestors coexisted at one time.

Back

False

Front

What determines when an era begins and ends?

Back

Mass extinction.