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Geology Of The Deschutes Basin - Essay

Geology Of The Deschutes Basin



Our story starts back before the Miocene Age. Little is known about this time, however what we do know is that the shore line was much further in than it is now on the west coast; In fact back then the ocean was totally covering what we now know as Oregon.
In the Miocene age, 17 million years ago, the pacific plate was drifting in towards the continental plate, creating more land. Because of this, many people believe that there are rocks as old as Pre-Cambrian age under the new Cascades and Deschutes basin area.
The Deschutes Columbia Plateau is a very volcanic area and is surrounded on all sides by mountains. During the Miocene age, there was a large out poring of lava and volcanic ...

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landing us around 8 million years ago. This is when the new Cascades were created. The new Cascades caused there to be a great difference in the climate on the West Side and the East Side of the mountain range.

Our field trip started by driving through the city of Bend and its geology. In Bend there are two Buttes. There is Pilot Butte, which is the oldest, and there is Awbrey Butte. Pilot Butte is a composite cone with no crater. This Butte is surrounded by older lava from the Newberry crater area. Both Pilot and Awbrey Butte are Kipukas because they are both islands surrounded by older rock. Our next stop was in Dry Canyon, where we observed a few faults and also the basaltes that would have come from the old Cascades. After that we drove to Cline Buttes. On the way we learned how to distinguish how the rock and sediment we were observing were deposited. Rocks that are rounded and close together, mostly likely were deposited by a stream or river, rocks that are ...

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Geology Of The Deschutes Basin. (2005, June 23). Retrieved December 23, 2024, from http://www.essayworld.com/essays/Geology-Of-The-Deschutes-Basin/28962
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PAPER DETAILS
Added: 6/23/2005 05:06:54 PM
Category: Geography
Type: Premium Paper
Words: 773
Pages: 3

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