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Posted on 7/10/14 at 4:31 pm to RBWilliams8
quote:
How can I google facts about rocks?
If you just type a sentence straight into google.
Is that what you're implying I did?
ETA: That's all for me. Thanks for the questions!
This post was edited on 7/10/14 at 4:37 pm
Posted on 7/10/14 at 4:40 pm to Pectus
quote:
Do you remember what cave it was?
It was mystic caverns.
Damnit!
This post was edited on 7/10/14 at 4:41 pm
Posted on 7/10/14 at 4:44 pm to Pectus
I gotcha thanks. Yeah it's sharp.
Posted on 7/10/14 at 4:47 pm to Pectus
quote:
For the other rock: Do you know if the rock would leave a black residue on your hand? And was it light weight or rather dense?
You showed a picture of obsidian. That's it.
Out of curiosity, how was it formed, what other geological traits would be in this area? I've always thought that this area was old. A former mountain range (Appalachian) eroded over time. That soil was also black through plant degradation.
Posted on 7/10/14 at 5:17 pm to Pectus
quote:
A lot of railroad rock is slag
Nah, this was like some fresh crush n run. Pound, pound and a half, sharp edges, hard as hell.
Another serious question. A friend lives near a gravel mine in central Georgia. He claims that the gravel they mine here is an extension of Stone Mountain...a hundred miles away. He said that drilling a well if futile.
Posted on 7/10/14 at 5:46 pm to Pectus
quote:
OK, checked my notes:
1.4 billion Pikes Peak Granite
1.7 billion Royal Gorge Gneiss
I felt like 1.7 was floating in my brain...just had to make sure.
Thanks Pectus. I find geology really interesting. I never paid much attention to it until I moved out here but now I'm surrounded by it. It's really interesting to drive around and look at how the rock types change as you travel. For example, around here, it's red sandstone (eroded remnants of the ancestral Rocky Mountains) with granite intrusions such as Pikes Peak. Further south it's more volcanic. You see dikes and sills and old dormant volcano cones.
Also, I think I read that the Pikes Peak batholith that Pikes Peak formed from is 1.06 billion. But there are other ones with the same K-feldspar granite that are older. I'm guessing the one around Canon City (Royal Gorge area) is one such.
Posted on 7/10/14 at 5:56 pm to MountainTiger
Little known fact: Pectus actually penned Twisted Sister's hit song, "I Wanna Rock."
At one point Pectus thought he had found a massive coprolite, but it was really just a pile of schist.
At one point Pectus thought he had found a massive coprolite, but it was really just a pile of schist.
Posted on 7/10/14 at 6:06 pm to Pectus
The granite in my kitchen and 4 of my bathrooms look like that castor brown picture.
I have a friend who is a geologist. Unfortunately, he took his wife for granite and she left him! :rimshot:
I have a friend who is a geologist. Unfortunately, he took his wife for granite and she left him! :rimshot:
This post was edited on 7/10/14 at 6:27 pm
Posted on 7/10/14 at 7:07 pm to Pectus
What makes dolomite harder than granite? (Heard on History channel the Egyptians used dolomite to chip granite.)
Posted on 7/10/14 at 8:02 pm to nuwaydawg
quote:
Out of curiosity, how was it formed, what other geological traits would be in this area? I've always thought that this area was old. A former mountain range (Appalachian) eroded over time. That soil was also black through plant degradation.
Obsidian forms from a lava rich in silica cools rapidly
Posted on 7/10/14 at 8:06 pm to nuwaydawg
quote:
Another serious question. A friend lives near a gravel mine in central Georgia. He claims that the gravel they mine here is an extension of Stone Mountain...a hundred miles away. He said that drilling a well if futile.
Sedimentary rocks exist as beds of rock that can extend form thousands of kilometers in all directions. These beds get tilted when a mountain is formed. You can trace beds that are relatively flat in the plains to almost tilted 90 degrees vertical from the pushing up during mountain building. It makes sense that a bed can be part of a mountain and part of an area really far away with not the same tilt or exposure in height involved.
Posted on 7/10/14 at 8:08 pm to MountainTiger
quote:
Thanks Pectus. I find geology really interesting. I never paid much attention to it until I moved out here but now I'm surrounded by it. It's really interesting to drive around and look at how the rock types change as you travel. For example, around here, it's red sandstone (eroded remnants of the ancestral Rocky Mountains) with granite intrusions such as Pikes Peak. Further south it's more volcanic. You see dikes and sills and old dormant volcano cones.
Also, I think I read that the Pikes Peak batholith that Pikes Peak formed from is 1.06 billion. But there are other ones with the same K-feldspar granite that are older. I'm guessing the one around Canon City (Royal Gorge area) is one such.
No prob. Glad you love Colorado and its geology. I worked for 3 summers out there as a teacher/field geologist, it was amazing. I go up every year to conduct my field research as well. On top of that I have friends and family that live there. Needless to say I make it up there about twice every year. I want Colorado to be where I permanently establish my residence.
I'll actually be up there in a week's time.
Posted on 7/10/14 at 8:08 pm to Pectus
Disappointed.. I came in here thinking this was a thread about some female poster named rocks!! Oh well.. I pick up some rocks when I have to walk my train to give to my kids..we actually call them ballast..
Posted on 7/10/14 at 8:10 pm to ChineseBandit58
quote:
What makes dolomite harder than granite? (Heard on History channel the Egyptians used dolomite to chip granite.)
I didn't hear that. I thought the Egyptians only worked on limestone blocks they quarried.
Either way sometimes granite can be chipped away at if it has been weathered for some time. Water can infiltrate between crystals and act as a weakening forced between the crystals. With that, simple tools could be used to scrape the granite and shape it in the way it needed shaping.
Posted on 7/10/14 at 8:12 pm to Pectus
I've always been curious how this Rock Shop in a shopping center near my house stays open.
The place that was there before them was a subway I think, it lasted a few months, the rock shop has been there at least a year now.
The place that was there before them was a subway I think, it lasted a few months, the rock shop has been there at least a year now.
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