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Jun 22, 2005, 10:08 PM
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#1 |
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VETUS INFLATIO
Join Date: Sep 2002
Location: Red Lodge UK
Posts: 15,699
 
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valley
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Jun 23, 2005, 05:49 PM
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#2 |
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Driverheaven brewmaster
Join Date: Oct 2002
Location: British Columbia, Canada
Posts: 4,835
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That's a really nice one...too bad the air looks polluted.
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Jun 23, 2005, 06:29 PM
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#3 |
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VETUS INFLATIO
Join Date: Sep 2002
Location: Red Lodge UK
Posts: 15,699
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it is actually...several brush fires sent ash and other particulate matter into the air...downright nasty.
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Jun 23, 2005, 06:40 PM
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#4 |
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F.U.B.A.R.
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oh so purty
 . looks like it's part of a fault line |
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Jun 23, 2005, 11:17 PM
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#5 |
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VETUS INFLATIO
Join Date: Sep 2002
Location: Red Lodge UK
Posts: 15,699
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those are actually accreted terrains from the collision of several layers of a geologic unconformity, they are actually composed of layers of sea bottom and crust that have been turned upside down and forced up on shore by tectonic activity..
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Jun 24, 2005, 02:26 AM
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#6 |
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F.U.B.A.R.
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so you're saying that at one point in Earth's life, those mountains were ocean floor?
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Jun 24, 2005, 07:08 AM
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#7 |
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VETUS INFLATIO
Join Date: Sep 2002
Location: Red Lodge UK
Posts: 15,699
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Plate tectonics is a relatively new theory that has revolutionized the way geologists think about the Earth. According to the theory, the surface of the Earth is broken into large plates. The size and position of these plates change over time. The edges of these plates, where they move against each other, are sites of intense geologic activity, such as earthquakes, volcanoes, and mountain building. Plate tectonics is a combination of two earlier ideas, continental drift and sea-floor spreading. Continental drift is the movement of continents over the Earth's surface and in their change in position relative to each other. Sea-floor spreading is the creation of new oceanic crust at mid-ocean ridges and movement of the crust away from the mid-ocean ridges. California is earthquake intensive because of the movement of faults that are constantly in motion.
  The Faralon Plate, named for the Faralon islands is not readily seen because it actually is being subducted under the edge of California, but it is responsible for quakes there, much of the earth is actually crust that is formed by volcanic activity and forced upward by plate collision. The rest of the older earth crust is called "shield" crust, but it just means it is older geologically. California is relatively new crust, as is Nevada as well. Those areas of intense volcanic activity and mountian building typically have large deposits of sulfides, like copper, silver, gold, etc. Last edited by fallang_jeff; Jun 24, 2005 at 07:19 AM. |
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Jun 24, 2005, 10:44 AM
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#8 |
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F.U.B.A.R.
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nice read jeff
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Jun 24, 2005, 12:29 PM
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#9 |
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Driverheaven brewmaster
Join Date: Oct 2002
Location: British Columbia, Canada
Posts: 4,835
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Thanks jeff, that's straight from my geography 113 class in college
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Jun 24, 2005, 02:08 PM
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#10 |
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VETUS INFLATIO
Join Date: Sep 2002
Location: Red Lodge UK
Posts: 15,699
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ha ha, took two years of Geology in Reno, wanted to work for the Keencutt mining company
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