PLATE TECTONICS: REASONS in FAVOR

Volcanic Activity World Map

Distribution of volcanic activity around the world

Earthquake World Map

Distribution of earthquakes around the globe

Orientation of Magnetic Field Lines on Both Sides of Mid-Atlantic Ridge

LEFT: age of the oceanic crust on both sides of the mid-Atlantic ridge. RIGHT: orientation of magnetic field on both sides of the ridge

Similarity of Continental Boundaries

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African and South American maps from 1858 emphasizing the similarity between boundaries of these continents

Plate Boundaries

There are about 20 tectonic plates known today