Plate Tectonics Intro

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Information about Plate Tectonics Intro
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Published on November 25, 2008

Author: adorngeo

Source: slideshare.net

Introduction: Theory of Plate Tectonics

4600000000 Years Old! Difficult to fathom as our life spans only 80 Simplified history of Earth – Waugh pg. 9 Oldest rocks are ~ 4 billion years old Found in the Northwest Territories

Difficult to fathom as our life spans only 80

Simplified history of Earth – Waugh pg. 9

Oldest rocks are ~ 4 billion years old

Found in the Northwest Territories

Internal Structure of the Earth Crust Sima-Oceanic Sial-Continental

Internal Structure of the Earth

Internal Structure of the Earth Below the Crust is the Mantle, which is relatively rigid! Asthenosphere is part of the Mantle, that semi molten Confused yet…

Theory of Plate Tectonics Alfred Wegener’s 1915 drawing of Pangaea

Continental Drift

Major Plates

How do Plates Move?

Good Fit What is some Evidence to support his Theory

Rocks & Mountains

Fossils

Sea Floor Spreading

Age of the Sea Floor

Evidence for the Theory Continental shelves seem to fit together Rock units and mountain ranges fit Pangaea Fossil types fit Pangaea Ocean research uncovered sea floor spreading Radio-geology allowed us to date the age of rocks Polarity of Rocks-Magnetic Evidence

Continental shelves seem to fit together

Rock units and mountain ranges fit Pangaea

Fossil types fit Pangaea

Ocean research uncovered sea floor spreading

Radio-geology allowed us to date the age of rocks

Polarity of Rocks-Magnetic Evidence

Why do we Care? Curiosity Explain landforms Find valuable minerals Explain and predict potential hazards

Curiosity

Explain landforms

Find valuable minerals

Explain and predict potential hazards

Plate Boundaries Where the Action Is Where new land is created Where most the most interesting landforms are found Where most Earthquakes & Volcanoes occur

Where new land is created

Where most the most interesting landforms are found

Where most Earthquakes & Volcanoes occur

Earth Quakes and Volcanoes

What Happens at Plate Boundaries?

Subduction Boundary Ocean to Ocean

Satsuma Iwojima – Cinder Cone Volcano , Japan

Subduction Boundary Ocean to Continent

Mt. Rainer, Washington State

Subduction Boundary Continent to Continent

Sagarmatha - Himalayas

Divergent Boundary

Ocean Ridges

East African Rift Valley

Collision Boundary

Eastern Sierra Fold Mountains

Transform Boundary

San Andreas Fault - California

 

 

Hot Spots

Haleakula Crater, Maui Hot Spot Volcano

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