Plate tectonics

Earth Materials – Geology Plate tectonics Why have all the mountains not worn away by now?

Earth Structure ,[object Object],[object Object],[object Object],[object Object]

Composition ,[object Object],[object Object],[object Object],[object Object],[object Object]

Rock Cycle ,[object Object],[object Object]

Deposition of sediments ,[object Object],[object Object],[object Object],[object Object]

Sedimentary rocks ,[object Object],[object Object],[object Object]

Unstable Earth ,[object Object],[object Object],[object Object]

Tilted and Folded ,[object Object],[object Object],[object Object],[object Object]

Alfred Wegener ,[object Object],[object Object],[object Object],[object Object]

Evidence ,[object Object],[object Object]

Earthquakes ,[object Object],[object Object],[object Object]

Sea floor spreading ,[object Object],[object Object],[object Object],[object Object]

Why spread? ,[object Object],[object Object],[object Object],[object Object]

More evidence ,[object Object],[object Object],[object Object]

So the Earth must be growing? ,[object Object],[object Object],[object Object],[object Object]

Continents Collide ,[object Object],[object Object],[object Object],[object Object]

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