The Relative Age of Rocks

Front

The number of years that have passed since the rock formed is the rock's

Back

absolute age

Front

The age of a rock compared to the ages of other rocks is the rock's

Back

relative age

Front

A formation of igneous rock on Earth's surface is known as

Back

an extrusion

Front

A break in Earth's crust is called

Back

a fault

Front

A mass of igneous rock below the Earth's surface is called a __________

Back

intrusion

Front

A gap in the geologic record is known as a(n)_______________.

Back

unconformity

Front

According to the law of __________, in horizontal sedimentary rock layers the oldest layer is at the bottom and the youngest layer is at the top.

Back

geology

Front

An extrusion is always younger than the rocks below it.

Back

True

Front

An intrusion is always younger than the rock layers around and beneath it.

Back

True

Front

The best index fossils have which two traits? Options: widespread geographically, long lifespan, widespread geographically, short lifespan, specific place, long lifespan, specific place, short lifespan

Back

widespread geographically, short lifespan