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These two are amazingly similar
#18696
11/14/08 08:44 PM
11/14/08 08:44 PM
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Joined: May 2007
west Michigan, USA
jadlh
OP
Old hand
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OP
Old hand
Joined: May 2007
west Michigan, USA
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By chance I happen to notice the shape in these two photos resemble eachother. I know the Devils tower is the remains of a volcano, but the shape of the mountain in Yosemite I believe is not a volcano....anyone know? Devils tower In Yosemite shot from a moving car
Nolad Mechadesh
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Re: These two are amazingly similar
[Re: jadlh]
#18697
11/15/08 05:00 AM
11/15/08 05:00 AM
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Joined: Dec 2005
Dandenong Ranges, Melbourne, A...
PossumCorner
Old hand
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Old hand
Joined: Dec 2005
Dandenong Ranges, Melbourne, A...
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Quote:
...but the shape of the mountain in Yosemite I believe is not a volcano....anyone know? ...
Geologists fight and argue about the plutonic-volcanic link, so what would we simple photographers know? Any geologists on the forum? Great shots to compare - it is like 'when is a volcanic plug not a volcanic plug'.
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Amazingly similar - but different
[Re: jadlh]
#18698
11/15/08 11:39 AM
11/15/08 11:39 AM
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Joined: Feb 2006
Donner Summit, CA
glamson
Veteran
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Veteran
Joined: Feb 2006
Donner Summit, CA
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Quote:
By chance I happen to notice the shape in these two photos resemble eachother. I know the Devils tower is the remains of a volcano, but the shape of the mountain in Yosemite I believe is not a volcano....anyone know?
The shapes in these two photos do resemble each other, but these two formations are very different both visually and geologically. While both are very dramatic, Devils Tower is a true "tower" of rock that rises alone above the surrounding landscape. El Capitan on the other hand is a protruding formation in the massive north wall of the Yosemite valley. Geologically, they are both of igneous origin, but they followed very different paths. Although they are both igneous, the current formations are not really volcanic, but rather are "intrusions" of molten rock that have been exposed by either being uplifted in the case of Yosemite and eroded in the case of Devils Tower. The rock itself is also quite different as Yosemite is granitic as a result of repeated cycles of glaciation while the Tower is still raw igneous rock.
I would refer you to the following links for more detailed info.
Yosemite geology http://en.wikipedia.org/wiki/Geology_of_the_Yosemite_area
Devils Tower geology http://www.nps.gov/archive/deto/geology.htm
Geo
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Re: Amazingly similar - but different
[Re: glamson]
#18699
11/16/08 12:55 AM
11/16/08 12:55 AM
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Joined: May 2007
west Michigan, USA
jadlh
OP
Old hand
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OP
Old hand
Joined: May 2007
west Michigan, USA
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The shapes in these two photos do resemble each other, but these two formations are very different both visually and geologically. While both are very dramatic, Devils Tower is a true "tower" of rock that rises alone above the surrounding landscape. El Capitan on the other hand is a protruding formation in the massive north wall of the Yosemite valley. Geologically, they are both of igneous origin, but they followed very different paths. Although they are both igneous, the current formations are not really volcanic, but rather are "intrusions" of molten rock that have been exposed by either being uplifted in the case of Yosemite and eroded in the case of Devils Tower. The rock itself is also quite different as Yosemite is granitic as a result of repeated cycles of glaciation while the Tower is still raw igneous rock. I would refer you to the following links for more detailed info. Yosemite geology http://en.wikipedia.org/wiki/Geology_of_the_Yosemite_areaDevils Tower geology http://www.nps.gov/archive/deto/geology.htmGeo
Thank you for the "rock" lesson, I find it very interesting, I'm always reminded of the addage the more you know...the more you don't know.
Nolad Mechadesh
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