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Post by nichwhitt on Jul 19, 2012 10:49:26 GMT -5
Just happened to stumble by this one. Extremely heavy for its size = iron...guessing the crystals in the one band are feldspar and the glittery-ness is from pyrite? Attachments:
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Post by leonardo on Jul 19, 2012 14:25:06 GMT -5
If I get back there this summer I would like to go looking for rocks with you ,You seem to have a good eye for finding them.....
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Post by arappaho on Jul 19, 2012 20:55:42 GMT -5
That is a real nice piece to stumble upon, nichwhitt. There are all kinds of red and black layered rocks found all over the country, but that there piece is really close to something called Binghamite from your parts. Not saying that's what it is, but looks really close. en.wikipedia.org/wiki/Binghamite
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Post by nichwhitt on Jul 20, 2012 6:30:12 GMT -5
Thanks guys. I've just been going with Banded Iron Formation, however this rock does seem to have some ingredients in common with Binghamite, such as hemadite and goethite and the red streaks could be quartz based. I'm about 90 miles from the locale its known for. Good observation, arappho.
@ leonardo My eyes are firmly planted on the ground at all times, heh, and I throw back more rock than I keep. My summers are pretty insane, but around Sept, things should start to mellow out.
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Post by leonardo on Jul 20, 2012 11:35:39 GMT -5
Thanks...that may work....keep my eyes close to the ground also...found $1300 in the Las Vegas airport parking lot doing that. No rocks though.haha
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Post by rocksinthehead on Jul 20, 2012 13:12:48 GMT -5
Hey Leonardo,
I think I might have dropped that money. Did the bills have pictures of dead presidents on them? You can send it to me when you get the chance. ;D
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Post by leonardo on Jul 20, 2012 18:48:20 GMT -5
If you can tell me what year I found them I will do that....
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Post by leonardo on Jul 20, 2012 18:49:31 GMT -5
If you can tell me what year I found them I will do that....
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Post by rocksinthehead on Jul 20, 2012 19:25:08 GMT -5
Details, details. My guess is that it was the year you had a little extra cash in your pocket to buy some neat rocks! ;D
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Post by nichwhitt on Aug 3, 2012 10:36:20 GMT -5
I received this email about the above rock and thought I would share. It doesnt contain any new or surprising information, but interesting none the less. "Nicole: I just arrived back from a long MN trip the other day. I was cleaning out my emails and am not sure if I responded to you yet. Before the Moose Lake and Celebration of Agates shows, I was working on product and became quite sleep deprived. I did get to check email a couple of times during my nearly 2 weeks of travel, but I'm not sure if I answered your email. It is always hard to tell for sure from pictures, but I believe your specimen is banded iron formation. There was a period of time around 2 billion years ago when a certain type of blue-green algae was populating the earth. This was the first organism to use the energy of the sun and photosynthesize its food supply, giving off oxygen in the process. Prior to the stramatolites, there was no free oxygen in the atmosphere. As a result of the free oxygen, much of the iron in solution in the shallow oceans that existed at the time combined with the oxygen to create iron oxide. This iron oxide sank to the bottom of the seas. At times, there were tremendous blooms of this algae. Their remains also sank creating the red jasper. Over time, the deposited layers alternated between iron and jasper. Thanks, Karen Brzys Gitche Gumee Museum Grand Marais, Michigan www.agatelady.comwww.agatelady.blogspot.com"
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feidzd
Senior Member
Posts: 28
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Post by feidzd on Aug 3, 2012 21:18:21 GMT -5
Is this the iron ore and heavy metal?
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