19-Ocean Floor - In-Austin Field Trip starts Wednesday!Wear...

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Unformatted text preview: In-Austin Field Trip starts Wednesday!Wear clothes and shoes you don’t mind getting a little dirty!Come to lab on time!Fill out waiver/insurance form before lab!Geology of the ocean floorOcean ridge systemOcean trench systemMajor mountain beltsContinental driftSome puzzling dataChapter 21: Ocean basinsNext Lecture: Chapter 22Geology of the ocean floorOcean ridge systemOcean trench systemMajor mountain beltsContinental driftSome puzzling dataChapter 21: Ocean basinsNext Lecture: Chapter 22Source: IDDPWe start our tour in Iceland. In this map of the sea floor and adjacent land masses, we see that it lies on top of a ridge going along the ocean floor.Iceland is very volcanically active – a land of both ice and fire! Here we see a glacier actually flowing into a volcanic crevasse!The Eyjafjallajökull volcano in Iceland (A-yah-fyaddla-yoekuddl)Occasionally Iceland features very large eruptions, although for the most part the society has learned to live with them, much as in Hawaii. How would you like to wake up one morning and see this out your back window?Image from nasa.govThe Eyjafjallajökul eruption this Spring caused widespread disruption to air traffic in Europe; airborne volcanic glass can be very destructive to aircraft engines. One way Icelanders make the best of the situation is to extract energy from underground magma. By injecting water into deep holes and collecting the steam that comes out, they hope to provide for much of their energy needs.Currently-running steam plants already provide much power in Iceland. Tourists from around the world travel to swim in the warm, mineral-rich waters. Is geology good for your complexion? Some think so!Travelling southwest from Iceland, we see the ridge continue along the ocean floor into the North Atlantic. Then it seems to take a turn…Continuing through the Atlantic, we see the ridge system is composed of a series of generally north-south ridge segments connected by generally east-west segments, which we call “fracture zones” or “transform zones”. Note that the ridge segments are truncated by the fracture zones, whereas each fracture zone continues on to the east and west.30:1 vertical exaggeration...
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This note was uploaded on 03/21/2012 for the course GEO geo taught by Professor Long during the Fall '10 term at University of Texas.

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19-Ocean Floor - In-Austin Field Trip starts Wednesday!Wear...

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