jamesp
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Post by jamesp on Nov 26, 2014 16:54:21 GMT -5
Out of the tumbler. Quartz(Larry) finds real nice McDermitt wood. love this stuff. Subject stone, photos taken from 3 directions With the grain viewed as if looking at trunk Cross cut looking into pores Looking at the face when quarter sawn(should be vertical oops)
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Post by pghram on Nov 26, 2014 21:52:32 GMT -5
That cross cut looks really interesting.
Rich
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Post by Pat on Nov 26, 2014 21:53:00 GMT -5
Looks like wool fabric. Looking into the pores is the best!
I think McDermitt has everything!
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quartz
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breakin' rocks in the hot sun
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Post by quartz on Nov 26, 2014 23:38:51 GMT -5
Nice pics. Do you have high resolution to allow blowing up, or a real short lens? The edges on first pic. look like you got a dandy polish.
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jamesp
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Post by jamesp on Nov 27, 2014 2:51:52 GMT -5
Nice pics. Do you have high resolution to allow blowing up, or a real short lens? The edges on first pic. look like you got a dandy polish. A true macro is 1:1. This lens has a switch that allows 1:2 macro. Not sure what that means. I do know that a 1:1 needs a tripod to hold it steady. And has a shallow depth of field. And there are higher magnification lenses, I guess considered micro. The 1:2 was a hand me down that can be hand held if careful and has a decent depth of field of focus. Then blow the photo up, but my old camera does not have very high resolution. It must be 8-10 years old. That 1:2 lens is just well tuned for 1 inch rocks like tumbles. If a tripod was needed I think i would not take many photos due to laziness. I will add that the old camera says it has 6M resolution. And wife's new camera says 20M resolution. They both seem to be equal when blowing photos up as far as resolution. So I question the new resolution ratings. That Mcdermitt takes a fine polish. The stuff you sent has great replacement. I carefully used the grinder to remove any fractures. And create faces parallel and perpendicular to the grain for viewing pleasure. Fine fossil preservation.
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jamesp
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Post by jamesp on Nov 27, 2014 2:55:31 GMT -5
Looks like wool fabric. Looking into the pores is the best! I think McDermitt has everything! I think that Mcdermitt is one of the best preservations known Pat. I suppose we would know a lot more about the past if other prehistoric organisms were preserved so well.
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jamesp
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Post by jamesp on Nov 27, 2014 3:06:39 GMT -5
That cross cut looks really interesting. Rich Have polished about 6-8 cross cuts, this one was exceptional Rich. There is a sweet spot where the replacement is best preserved. This stone hit right on that area.
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Post by snowmom on Nov 27, 2014 5:35:35 GMT -5
awesome!
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Fossilman
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Post by Fossilman on Nov 27, 2014 10:42:05 GMT -5
Got wood!!!! Man,those are beauties James....
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jamesp
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Post by jamesp on Nov 27, 2014 10:54:59 GMT -5
Got wood!!!! Man,those are beauties James.... From your great state of Oregon.
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Post by roy on Nov 27, 2014 10:59:59 GMT -5
very nice !
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jamesp
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Post by jamesp on Nov 27, 2014 11:35:05 GMT -5
I think grayfingers knows the species of this material. I think this pattern is the most common. Seemed like Bill enlightened me on the type of tree that it is. If i remember right, the species is very strange and still growing in an exotic location. Where are you Bill ??
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Post by iant on Dec 6, 2014 4:06:48 GMT -5
Excellent photos of a beautiful piece Jim!
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jamesp
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Post by jamesp on Dec 6, 2014 6:50:31 GMT -5
Excellent photos of a beautiful piece Jim! We have little petrified wood in the SE US Ian, not well silicified anyway. How about Scotland ? Does pet wood occur there ?
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Post by iant on Dec 6, 2014 12:47:53 GMT -5
Excellent photos of a beautiful piece Jim! We have little petrified wood in the SE US Ian, not well silicified anyway. How about Scotland ? Does pet wood occur there ? Funny you should ask, I think I found a piece last week. Looks like it is burnt on one side, but clearly a stone. Ill try to post a pic tomorrow when I get some light.
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jamesp
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Post by jamesp on Dec 6, 2014 12:57:47 GMT -5
We have little petrified wood in the SE US Ian, not well silicified anyway. How about Scotland ? Does pet wood occur there ? Funny you should ask, I think I found a piece last week. Looks like it is burnt on one side, but clearly a stone. Ill try to post a pic tomorrow when I get some light. Looking forward to seeing it.
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Post by iant on Dec 6, 2014 15:09:35 GMT -5
The piece I found was at Lower Largo. Close to this beach which has interesting fossil wood. We visited Craill - the place in the article l too but the tide was in so we couldn't look at the wood and tracks. Another time though, as it is only 20 miles along the coast. Link not working www.discoveringfossils.co.uk/crail_fossils.htm
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jamesp
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Post by jamesp on Dec 6, 2014 17:45:17 GMT -5
The piece I found was at Lower Largo. Close to this beach which has interesting fossil wood. We visited Craill - the place in the article l too but the tide was in so we couldn't look at the wood and tracks. Another time though, as it is only 20 miles along the coast. Link not working www.discoveringfossils.co.uk/crail_fossils.htmThe island is diverse, color map looks like a rainbow. Right up to igneous and metamorphic on the north side. Lots of diversity and lots of shore to expose geology. Guessing you have large tide movements. Florida is 6 feet, Nova Scotia is like 60 feet. Nova Scotia's folks talk w/a strong Scottish accent. I have friends from both places and either one can cuss you and I never know it. LOL Plenty of fossils for Ian. The arthropleura looks alien enough. I see the tree stump. So you must live on the east coast 20 miles from Crail. it's a beautiful spot.
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Post by iant on Dec 7, 2014 6:18:08 GMT -5
Yes, I am on the coast. A place called Dalgety Bay. Sorry for crashing your thread Jim. Here are a couple of pics of the possibly pet wood: Any thoughts? I doubt it would tumble well. Too many fractures.
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jamesp
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Post by jamesp on Dec 7, 2014 8:16:10 GMT -5
Yes, I am on the coast. A place called Dalgety Bay. Sorry for crashing your thread Jim. Here are a couple of pics of the possibly pet wood: Any thoughts? I doubt it would tumble well. Too many fractures. That looks like wood we find in south Georgia and Florida. Hard to tell how it will tumble. The black is typical of fossilization around salt and/or black organic muck. Some is mineralized by replacement with apatite. Yours may be silica, you would have to do the scratch test. The well preserved wood is often in lava flows, where forests were covered in lava or associated w/lava. And the rich minerals replace the wood leaving the grain in tact. You may have basalt and ancient lava flows on the island. Perhaps that is the matrix you find your fine agates. I found your summer house on google earth-Inchcolm Abbey, out on the island Looks like a beautiful spot on earth, the area is so green. You are located in a protected inlet.
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