From Biologic to Geologic Evolution Lets look at the Earth!
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Transcript of From Biologic to Geologic Evolution Lets look at the Earth!
![Page 1: From Biologic to Geologic Evolution Lets look at the Earth!](https://reader036.fdocuments.net/reader036/viewer/2022062410/5697c02c1a28abf838cd914e/html5/thumbnails/1.jpg)
From Biologic to Geologic Evolution
Lets look at the Earth!
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With Your Group:
How does our new knowledge of refraction through different densities give us information about the earth?
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Evidence From Earthquakes: P&S waves
P (primary) waves= Compression (push/pull waves)
S (secondary) waves= Transverse (up/down waves)
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Mohorovicic (Moho) Discontinuity
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Plate TectonicsPlate Boundaries and Interactions
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The Theory of Plate Tectonics The Earth’s surface is divided into plates that move and
interact with one another.
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Overview of Plate Boundary Interactions
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Divergent Plate Boundaries
• Plates are moving apart. New crust and lithosphere is “created”
• Associated with ocean ridges, rift valleys, volcanism, earthquakes and high heat flow.
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Examples found on Earth: Mid-Atlantic Ridge, African Rift Valley, Iceland
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• Plates are moving towards each other. Old crust and lithosphere is “recycled”.
• Associated with ocean trenches, island arcs and mountain ranges.
• Earthquakes and volcanism are common.
Convergent Plate Boundaries
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Examples found on Earth: Himalayas, Pacific Ring of Fire, Andes Mountains, Marianas Trench
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• Plates slide past each other, oftentimes connecting two ridges or trenches.
• Crust is deformed or fractured; Lithosphere is neither created nor recycled.
• Long faults and earthquakes common.
Examples found on Earth: San Andreas Fault
Transform Plate Boundaries
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Plate Boundaries, Earthquakes and Volcanic Activity
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Continental Drift: Pangea
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Matching Fossils
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Matching Mountain Ranges
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Glacial Evidence
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Magnetism
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Earthquake Patterns
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Age of Rock
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