100+ Fern fossil found PowerPoint (PPT) Presentations, Fern fossil found PPTs

Fern fossil found - PowerPoint PPT Presentation

Building a Theory of Plate Tectonics

Building a Theory of Plate Tectonics. The Theory of Plate Tectonics says that the Lithosphere is cracked and broken into pieces called plates that move on top of the convecting Asthenosphere . This motion creates mountains, volcanoes, trenches and earthquakes on the surface of the planet.

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Fern fossil found - PowerPoint PPT Presentation

Building a Theory of Plate Tectonics