EAS134 Is Earth Unique Plate Tectonics and Earth Structure

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EAS-134 Is Earth Unique?Plate
TectonicsandEarth Structure
Most images and text courtesy of The Atlas of
Life on Earth (consultant M. J. Benton) Borders
Press, Ann Arbor, Michigan, 2004.
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Gross structure of the Earth
mantle
outer core
inner core
(NASA)
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(No Transcript)
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Composition of the Earths crust, mantle, and core
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Mantle convection, ridges, and subduction zones
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Plate Boundaries
(NASA)
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Plate Boundaries and Earthquakes
(NASA)
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Current Plate Boundaries (Atlantic)red lines
ridgesblue lines subduction zonesyellow
lines transform (lateral) faults
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Current Plate Boundaries (Indian)red lines
ridgesblue lines subduction zonesyellow
lines transform (lateral) faults
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Current Plate Boundaries (Pacific)red lines
ridgesblue lines subduction zonesyellow
lines transform (lateral) faults
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Geological Processes Low Ground
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Sedimentary Rocks
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Sedimentary Rocks - 1
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Sedimentary Rocks - 2
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Geological Processes High Ground
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Metamorphic Rocks
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Igneous Rocks
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Rock Cycles
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Subduction Under South America
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Geochemical Cycles
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Evolution of Land Masses and Continents
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Archaean 4.0 By
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Proterozoic 2.5 By First Supercontinent Rodinia
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Cambrian 500 My Gondwana and Laurentia
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Ordovician 470 My Gondwana and Laurentia
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Silurian 430 My Gondwana Second Southern
Supercontinent
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Devonian 400 My Gondwana and Laurentia
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Early Carboniferous 350 My - huge shelf areas
around Laurentia
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Late Carboniferous 320 - Pangea is the new
supercontinent including Laurentia and Gondwana