EarthSci - Plate Tectonics
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5 Terms
Catastrophism
The earth was viewed as restless shaped by violent events
Was believed to be relatively young
Siccar Point
Rocky promontory on the east coast of Scotland
Principle of Original Horizontality
Layers of sediment (strata) are deposited horizontally due to gravity, like layers in a cake
Concepts of Modern Geology
Uniformitarianism: “The present is the key to the past”
Past geological events can be explained by forces occurring today (contrast of catastrophism)Gradual Change: Change is slow, so the earth is old
Earth is a dynamic plane with a constantly changing surface with its material being constantly recycled
What did Alfred Wegener propose?
Continents drifted & had formed one supercontinent called Pangea into smaller continents: Laurasia & Gondwanaland
Note 
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