Geological History and Unconformities Quiz

What period were the interbedded layers initially deposited in?

• Triassic

• Jurassic

• Cretaceous

• Carboniferous

What geological process caused the original horizontal layers to fold?

• Erosion

• Sedimentation

• Compression

• Volcanic activity

During which period were the red sands deposited?

• Permian

• Triassic

• Silurian

• Devonian

What type of unconformity is present at the coastal location in Portugal?

• Non-conformity

• Disconformity

• Angular unconformity

• Paraconformity

What happens to the ancient layers of rock before new layers are deposited at different angles?

• They are submerged

• They are uplifted

• They are eroded

• They are folded