Plate Tectonics Theory

Wegener's Continental Drift Theory

• Wegener suggested that the drifting of continents was responsible for the breakup of the supercontinent Pangaea.

Oceanic Tides

• The major cause of tides in oceanic waters is the gravitational pull of the Moon and the Sun.

Plate Boundaries

• Divergent boundaries occur when plates move apart, resulting in the creation of new crust.
• Convergent boundaries lead to subduction zones, where one plate is forced under another.

Tectonic Plates

• The Philippines plate is considered a minor plate in terms of area size.
• The Pacific plate is the largest in terms of area.

Plate Tectonics Theory

• The main idea behind the theory of plate tectonics is that the Earth's lithosphere is broken into plates that move relative to each other.

Plate Composition

• Oceanic plates are composed mostly of magnesium and silicon minerals.
• Continental plates are made up of continental crust rich in aluminum and silicon materials.

Evidence for Continental Drift

• Evidence supporting the Continental Drift theory includes fossil evidence, similar rock formations, and glacial deposits.
• A characteristic feature of tillite is that it is a type of sedimentary rock formed from glacial deposits.

Non-Evidence for Continental Drift

• The Earth's rotation is not a piece of evidence supporting the Continental Drift theory.