Geol105_Lecture_04

Geol105_Lecture_04 - Geol 105: Violent Earth Lecture 4...

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Click to edit Master subtitle style Geol 105: Violent Earth Lecture 4 Prof. Jonathan Lees
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Elements of Plate Tectonics (Cont) Hot Spots Triple Junctions Forces Driving Plates
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Hot Spots Place on Earth where there is an anomalous amount of heat and volcanism. Commonly associated with a deep source of magmatism, perhaps originating near the core-mantle boundary: “Mantle Plume Theory”
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Hot Spots Hawaii Iceland Galapagos Yellowstone
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Hawaiian Seamount Chain
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World Hotspots
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Yellowstone Hotspot Snake River Plain Topography
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Relative Plate Motions We discussed the interaction of 2 plates – what else should we consider?
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Triple Junctions When three plates meet – what happens? Ridge-Ridge-Ridge Ridge-Transform-Ridge Ridge-Trench-Trench Etc…. There are many combinations (~35)
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Rodriguez Triple Junction
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Afar Triple Junction
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Galapagos Triple Junction Galapagos is a hotspot and a triple junction
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Earth’s Magnetic Field Magnetic Rocks have been known to exist
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Geol105_Lecture_04 - Geol 105: Violent Earth Lecture 4...

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