Geology: Photographs.

Eu_citzen

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During my fieldtrips I often find something I like to photograph. I collect "geological pictures" from my trips in Sweden.
Thought I'd share some of them.

This one is interesting. To the left we have rhyolite, a volcanic rock. To the right of the big "bend" we have serpentinite. A metamorphic rock.
The "bend" (or deformation) is possibly a result of the alteration of the original rock to serpentinite. Simply because it increases in volume when it alters.



I love samples which are small enough to fit into the palm of my hand and still tell a little history.
This little metarhyolite shows what "faults" can look like in a small scale. (notice the red band in the lower right)




Breccia is something I don't see to often here. It is basically a fractured rock that got glued together.


Gneiss is also a metamorphic rock. Often with distinct "bands". This was a large boulder transported during the last ice age.


Here is a cool photo of a large rock wall. Also made of gneiss, from near the coast. The formation is called "Coastal gneiss".
I know, there seems to be a lack of fantasy for some names.:tongue3:


More gneiss, this time granitic gneiss. Notice the pegmatite vein near the middle. Thought it was neat.


Antiform, a little larger type. Basically an "upwards" fold, well part of in this case.


An intrusion of basalt. About 4 metres thick. If you look closely you can see pegmatite and quartz veins, to.


During the last ice age the ice sometimes "scraped" on the bedrock. It could then create "scratches", like those in the picture.
They help indicate which direction the ice had. Compass for size.


Sometimes you run out of time when you find something cool.
Here is one example, I never had enough time to examine it closely but think this is an ancient fault:


And to finish this off, a shear zone. The shear zone cut the vein in two.
 

mamabear

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Thank you for sharing your geo pix. I am the same, I take pix of oddities when I am out & about. It drives some of my friends nutz! But if I have a pic, then I can try to understand the formation by looking in my books or asking people like you. I will have to take some pix to share with you. By the way, pic #3 & 5 are amazing.
 
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Eu_citzen

Eu_citzen

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Thanks mama! I always bring my camera for any excursion, well I try to! Please do share! Always fun to see.
 
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mouseman60

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Yes, thank you for showing us your pictures. We all like looking at pictures. It makes us all think about the different rocks and how they are formed. I enjoy them thanks again.
 
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Eu_citzen

Eu_citzen

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I will put up more pics as I take them. Thanks for all the comments!
 
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Eu_citzen

Eu_citzen

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To keep this going. A little fault.
 
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BurntBear

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Bringing this back to the top!

Here are some formations through the Blue Ridge Parkway, cutting through the Blue Ridge Mountains on our way to go mining. This is near Blowing Rock, North Carolina.

125_1953.JPG 125_1954.JPG 125_1955.JPG

125_1971.JPG 125_1972.JPG 125_1973.JPG

125_1974.JPG

I have some formations here locally that I will post up soon. :thumbsup:
 
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Eu_citzen

Eu_citzen

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Interesting formation, BB, looks metamorphic.

G, I will. I just got a new job and haven't gotten out as much as I'd like.
 
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BurntBear

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I went out prospecting my friends property on a mountain top in North Carolina today. These are calcite and/or marble veins through Granitic Gneiss. Took some samples of veins and vugs. All of the exposed rock is growing serious moss; so we would peel back huge layers to see what bedrock lay beneath. I thought that was neat, lol. We had to expose all of these veins by peeling the moss away. Here are a few photos:


125_4381.JPG 125_4383.JPG 125_4384.JPG
125_4386.JPG 125_4387.JPG 125_4388.JPG
125_4390.JPG
 
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Eu_citzen

Eu_citzen

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I'd say quartz veins, metamorphic rocks again? :)
 
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Eu_citzen

Eu_citzen

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Well, time perhaps to bring this back to life; now I finally got some new pics after an excursion.
Click on the images for bigger ones!

Small deformational zone, probably a shear zone. A tiny one! Can you find it?
IMG_1350_zpsnwo6wwye.jpg

Deformed granite, from near the shear zone:
IMG_1354_zpsruk9pz2q.jpg

Close-up of the former, note the "dragged out" shape of the quartz:
IMG_1355_zpsuoecl0h2.jpg
 
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Eu_citzen

Eu_citzen

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Those are nice! What do you know about them? Looks sedimentary and the colors are likely results of iron-minerals.
 
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