Exercise 3 - Scott Pagan For over a century, geologists...

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Scott Pagan For over a century, geologists from all over the world have come to Yellowstone national  park. Not just for the beautiful landscapes but for the amazing geological activities that have  taken place there. This includes outstanding eruptions, widespread faulting, and thick lava  flows. These lava flows are proof of the identity that lies under Yellowstone national park.  Underneath Yellowstone is a massive 2 million year old volcanic plateau. That is only a fraction  of the time that the Yellowstone area has been volcanically active: 17million years. This has left  proof all over Yellowstone National Park with giant calderas that have been replaced by new  lava flows. The first caldera over the past 2.1 million years was 85 by 45, the second was  around 16 km in diameter, and the last one 75-95 by 40-60. Each of these eruptions were  enormous the first being around 1,000 km 3 , the second was 280 km 3 , and the last one erupted  close to 2,450 km 3 . The area covered by each eruption is as follows: the first 7,500 km 2 , the  second was 2,700 km 2 , and the last one was around 15,500 km 2 . Of course, these values are  not exact because the eruptions happened so long ago and no scientists were there to 
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This essay was uploaded on 04/19/2008 for the course GEO 2160 taught by Professor Harden during the Spring '08 term at University of South Florida - Tampa.

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Exercise 3 - Scott Pagan For over a century, geologists...

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