Geology of Portland Headlight

by Chris McGonigle

Geological Events

Origin of Earth

4,500,000,000 B.C.

Taconic Orogeny

471,000,000 B.C.

Acadian Orogeny

380,000,000 B.C.

Final Assembly of Pangea

280,000,000 B.C.

Basalt Dikes Intrude into Bedrock

200,000,000 B.C.

Opening of Atlantic Ocean

200,000,000 B.C.

Rocky Mountains Form

80,000,000 B.C.

Alps Form

60,000,000 B.C.

Collision of India with Asia

40,000,000 B.C.

Modern Man

10,000,000 B.C.