What is this rock? - The HuntingPA.com Outdoor Community
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post #1 of 13 (permalink) Old 08-03-2018, 09:20 AM Thread Starter
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What is this rock?

I found this rock by a little spring stream a few years back and I didn't know if it meant anything.
Looks man made to me.
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post #2 of 13 (permalink) Old 08-03-2018, 10:10 AM
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From what I can tell from the picture, not being there, it looks like veins of Quartz running through the rock.

When you are up to your butt in alligators, it is hard to remember your intent was to drain the swamp. Stay focused!
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post #3 of 13 (permalink) Old 08-03-2018, 10:21 AM
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Yeti egg?

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post #4 of 13 (permalink) Old 08-03-2018, 11:18 AM
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Ancient alien glyph.
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post #5 of 13 (permalink) Old 08-03-2018, 02:38 PM
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Quote:
Originally Posted by Born2Hunt View Post
Yeti egg?
And awaaaaay we go!

Good night Chesty, wherever you are......
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post #6 of 13 (permalink) Old 08-03-2018, 02:51 PM Thread Starter
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Fairly large rock, probably 24" diameter.
Interesting if it is quartz. I just didn't know if something was carved or was a marker for something.
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post #7 of 13 (permalink) Old 08-03-2018, 03:12 PM
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Looks water eroded and the harder minerals left a design . Your thinking like a true treasure hunter though .
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post #8 of 13 (permalink) Old 08-03-2018, 09:05 PM
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It's metamorphic and might be a variety of Serpentine, but testing and microscopic examination by a geologist is the only way to be sure. If you have a college nearby that offers courses in geology you might be able to do a walk in and get a definitive answer.
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post #9 of 13 (permalink) Old 08-04-2018, 10:43 AM
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Not metamorphic. Not a serpentine or travertine. Looks like plain old sandstone to me.

The rings are what's called Liesegang rings. There's a whole explanation of what is thought to cause them that'll even bore geologists. But, in a nutshell, it's a secondary sedimentation caused by a chemical weathering………….usually the oxygen in water leaching ferrous (iron) compounds and re-crystallizing.

Cool as heck rock, though !!!!

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post #10 of 13 (permalink) Old 08-04-2018, 11:55 AM
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I found a green quartz arrowhead once, only green quartz I ever saw ????
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