Topic 6.1 Determining Ages of Rocks

Front

What is always younger than the rock it cuts through?

Back

A fault is always younger than the rock it cuts through.

Front

What happens after 'Folding bends the rock layer'?

Back

The surface is eroded.

Front

Which layer is the oldest in a geological diagram?

Back

Layer 4 is the oldest.

Front

What is the result of folding rock layers completely over?

Back

An Overturned Fold.

Front

What is the geological term for a gap in the rock record?

Back

Unconformity.

Front

What is the principle of superposition?

Back

In an undeformed sequence of sedimentary rocks, the oldest layers are at the bottom.

Front

What is an unconformity?

Back

A gap in the geological record where rock layers are missing.

Front

What does erosion do to rock layers?

Back

Erosion removes material from the surface of rock layers.

Front

What is a fault in geology?

Back

A fault is a fracture in the Earth's crust along which movement has occurred.

Front

What is folding in geology?

Back

Folding is the bending of rock layers due to tectonic forces.