BMG
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Rock question
We were out for a walk on New Year's day and stumbled across this rock with some unusual colored bands in it. Anyone know what would cause these bands
of red and yellow?
I think the world is run by C- students.
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DENNIS
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Spray paint?
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BMG
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| Quote: | Originally posted by DENNIS
Spray paint? |
I don't think so. I think spray paint looks more like this.
I think the world is run by C- students.
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Mexitron
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Looks like granite surrounding the colored rock--I've seen sedimentary rocks "cooked" by granite batholith in the Sierra San Pedro Martir resulting in
some banding... ...or perhaps leached salts/crystals from weathering...? Those are my two guesses de jour...
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Barry A.
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I will take a stab at it--------
Looks like a eroded out cross-section of a anticline, or techtonic rock fold. Coloring in rocks is usually the result of mineral concentrations, but
not sure of what the actual colors in your picture represents. That is a neat geological find.
Barry
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longlegsinlapaz
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A prehistoric rainbow etched in stone! Bands of minerals would be my second guess. 
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Pompano
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Beats me, the girl next to me in Geology 101 was gorgeous.
Google says.....mesomorphic origins, banding is due to volcanic flows.
I do what the voices in my tackle box tell me.
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Barry A.
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| Quote: | Originally posted by Pompano
Beats me, the girl next to me in Geology 101 was gorgeous.
Google says.....mesomorphic origins, banding is due to volcanic flows. |
I believe that would be "metomorphic", not meso. Layering, like is in the photo, does indicate sedimentary or volcanic origin, and the bending of
those layers as seen in the photo causes extreme heat which "cooks" the layers and changes them considerably (metamorphous). Volcanic stuff is
frequently red, black, yellow, and colors in-between----so there could be several explanations.
I still think that place in the photo is rather remarkable, and worth remembering where that is.
I would bet that Pomp has bought a "Sleep Number" bed strickly because Lindsey Wagner is pushing them. 
Barry
[Edited on 1-3-2009 by Barry A.]
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Pompano
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Meso..meto...shamesso...I told you she was good looking.
I do what the voices in my tackle box tell me.
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Barry A.
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| Quote: | Originally posted by Pompano
Meso..meto...shamesso...I told you she was good looking. |
----------and with that comment, I went back and edited my post above.
Barry
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Pompano
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Barry...who is Lindsey Wagner??
..edited for spelling police. I am assuming Lindsey is a looker, right? Well, if she is younger than my daughter I am not interested. Plus I tried
that type of mattress right after the water-bed fiasco.
[Edited on 1-3-2009 by Pompano]
I do what the voices in my tackle box tell me.
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longlegsinlapaz
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Pompano, Lindsey was The Bionic Woman....remember? And somehow I doubt she's younger than your daughter, she was a year behind me at my HS, so that'd
put her right around 60ish; she was a couple years behind the Kingsmen of Louie, Louie fame....& Sam Eliot....Yellow Rose of Texas fame, amongst
many others.
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BAJACAT
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THE BIONIC WOMEN&BIONIC MAN
JAIME SOMMERS (BIONIC WOMAN)
STEVE AUSTIN(BIONIC MAN)
here goes another thread hijack by the BNHIJACKERS
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Mexray
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I think you've stumbled upon...
...a Rainbow Warrior's headstone...
According to my clock...anytime is \'BAJA TIME\' & as Jimmy Buffett says,
\"It doesn\'t use numbers or moving hands It always just says now...\"
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Barry A.
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| Quote: | Originally posted by Pompano
Barry...who is Lindsey Wagner??
..edited for spelling police. I am assuming Lindsey is a looker, right? Well, if she is younger than my daughter I am not interested. Plus I tried
that type of mattress right after the water-bed fiasco.
[Edited on 1-3-2009 by Pompano] |
Pomp--------I have been sleeping on a Select Comfort (Sleep number) bed for 10 years (without Lindsey, darn it) and they are GREAT!!!!
Barry
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BMG
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| Quote: | Originally posted by Barry A.
I still think that place in the photo is rather remarkable, and worth remembering where that is.
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Thanks for the rock info. I have walked over this rock many times before and finally stopped to take some photos.
I think the world is run by C- students.
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Bwana_John
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OK, Ill try,
The colors themselfs are from hemitite and limonite, oxides of iron, basicly rust.
The colors being "banded" or "layered" could possibly be a concretion in sedimentary rock, or if volcanic due to diferent minerels being deposited by
a many sucessive volcanic flows, in either rock type due to diferential weathering conditions under the ground like different climates when exposed,
or ground water level that changed, or the rock was partilly exumed then recovered, or a combination of these.
It could be flow banding in metamorphic rocks, but I dont think so, I think diferential weathering.
[Edited on 1-4-2009 by Bwana_John]
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