The Oldest Rock Formations on Earth

Front

What is sedimentary rock?

Back

Rock that has formed through the compaction and cementation of sediments.

Front

How old is the Nuvvuagittuq Greenstone Belt?

Back

Between 3.8 billion and 4.3 billion years old.

Front

What is the source of energy responsible for plate motion?

Back

The Earth's interior.

Front

What drives weathering and erosion of rocks?

Back

The sun.

Front

How many types of rocks are classified by geologists?

Back

3 types: igneous, sedimentary, and metamorphic.

Front

What are igneous rocks?

Back

Rocks formed from the cooling and solidification of magma or lava.

Front

What are metamorphic rocks?

Back

Rocks that have been changed by heat, pressure, or chemical processes.

Front

What is the rock cycle?

Back

The continuous process of rock formation, breakdown, and reformation.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form inside the Earth, while extrusive rocks form on the surface.

Front

What is erosion?

Back

The process by which soil and rock are removed from the Earth's surface by natural processes.