stewdogg
spending too much on rocks
Member since January 2020
Posts: 388
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Post by stewdogg on Feb 11, 2021 13:07:51 GMT -5
Thanks for appeasing me with my questions and sorry to put you on the spot, especially in front of all these rock people! That explanation makes sense to me and makes it a bit more obvious to me as to what each one is. I totally understand the sensory overload! Jugglerguy was kind enough to point me towards some very nice places along Lake Superior that was like a Willy Wonka wonderland for rock junkies! So much beautiful stuff to look up at, but so much more to look down at. Anything not wet just looked like dusty gray gravel and the stuff that was wet looked like candy. Haha, I look forward to the overload! |
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Post by jasoninsd on Feb 11, 2021 13:25:20 GMT -5
Thanks for appeasing me with my questions and sorry to put you on the spot, especially in front of all these rock people! That explanation makes sense to me and makes it a bit more obvious to me as to what each one is. I totally understand the sensory overload! Jugglerguy was kind enough to point me towards some very nice places along Lake Superior that was like a Willy Wonka wonderland for rock junkies! So much beautiful stuff to look up at, but so much more to look down at. Anything not wet just looked like dusty gray gravel and the stuff that was wet looked like candy. Haha, I look forward to the overload! You didn't really put me on the spot.  - I made sure I prefaced what I said with the caveat I had no business answering it from a technical standpoint! LOL I should have tagged 1dave on your original question... Dave, would you explain the difference in the banding of Fairburn Agates versus the banding in Prairie Agates? I tried to explain it in layman terms, but I too am curious as to the actual scientific difference between them. I can tell visually - easily now - but it wasn't always so... |
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Post by Jugglerguy on Feb 11, 2021 15:45:23 GMT -5
Thanks for appeasing me with my questions and sorry to put you on the spot, especially in front of all these rock people! That explanation makes sense to me and makes it a bit more obvious to me as to what each one is. I totally understand the sensory overload! Jugglerguy was kind enough to point me towards some very nice places along Lake Superior that was like a Willy Wonka wonderland for rock junkies! So much beautiful stuff to look up at, but so much more to look down at. Anything not wet just looked like dusty gray gravel and the stuff that was wet looked like candy. Haha, I look forward to the overload! Which spot was that? I don't remember. The Old 28 beach? |
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Sabre52
Cave Dweller 
Me and my gal, Rosie
Member since August 2005
Posts: 20,494
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Post by Sabre52 on Feb 11, 2021 15:50:03 GMT -5
I'm a big fan of Prairie Agate. Hard material and sometimes the black ones and red ones have amazing patterns on the inside, even scenes. I've even seen a few with nice dots,orbs, or pigeon blood agate type inclusions. Hard to believe you can still find a bunch of those to collect. Just curious, do you ever find where Amerinds were knapping Prairies? I don't believe I've ever seen a point from that material.
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stewdogg
spending too much on rocks
Member since January 2020
Posts: 388
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Post by stewdogg on Feb 11, 2021 16:23:07 GMT -5
Thanks for appeasing me with my questions and sorry to put you on the spot, especially in front of all these rock people! That explanation makes sense to me and makes it a bit more obvious to me as to what each one is. I totally understand the sensory overload! Jugglerguy was kind enough to point me towards some very nice places along Lake Superior that was like a Willy Wonka wonderland for rock junkies! So much beautiful stuff to look up at, but so much more to look down at. Anything not wet just looked like dusty gray gravel and the stuff that was wet looked like candy. Haha, I look forward to the overload! Which spot was that? I don't remember. The Old 28 beach? I believe that was the one... the highway just drops off to a gravel road at 55mph. I believe there was camping on that road as well? To be honest all the spots you gave me were awesome. I have to stop being lazy and get some pics up of the rocks I polished from that trip last fall. |
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Post by jasoninsd on Feb 11, 2021 17:26:54 GMT -5
I'm a big fan of Prairie Agate. Hard material and sometimes the black ones and red ones have amazing patterns on the inside, even scenes. I've even seen a few with nice dots,orbs, or pigeon blood agate type inclusions. Hard to believe you can still find a bunch of those to collect. Just curious, do you ever find where Amerinds were knapping Prairies? I don't believe I've ever seen a point from that material. I actually have found a piece that showed evidence of knapping! It was a large piece that I knew it had been worked. There's a ton of cattle around the area and it's very common to see prairie agates which have been stepped on and broken by the cows. However, the piece I found was not broken by cattle. I could easily tell this was a stone which had been worked by humans. I found it when I was only a couple months into hounding, so even though I knew what it was, I didn't know the actual significance of the find. It was a large piece and I was quite a ways from the vehicle...and I didn't want to haul it around half the day. Now, I regret that decision. I know the approximate area I found it and will look for it again... |
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Post by jasoninsd on Feb 11, 2021 17:28:07 GMT -5
Which spot was that? I don't remember. The Old 28 beach? I believe that was the one... the highway just drops off to a gravel road at 55mph. I believe there was camping on that road as well? To be honest all the spots you gave me were awesome. I have to stop being lazy and get some pics up of the rocks I polished from that trip last fall. I'd love to see those!  |
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Post by jasoninsd on Feb 11, 2021 21:33:41 GMT -5
RickB and amygduleYou guys had posted pics of worm colonies. I find a lot of this material out here at Railroad Buttes. Usually I find it with the tubes empty, but this last time I found a piece with what looks like a quartz material in the tubes. Do you guys think this material is worm colony? The first pic shows a typical example I find with the empty tubes. The other pics are of the newest piece.   
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Post by stephan on Feb 11, 2021 23:54:38 GMT -5
Here's a prairie agate I cut the other day. I was a bit surprised at the interior of this one. I loved the patterns on the exterior and was really curious to see what the interior looked like... I know it's not, but it really reminded me of the interior of coprolite.   Cool patterns, and an interesting shape. |
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Post by jasoninsd on Feb 12, 2021 0:37:19 GMT -5
Here's a prairie agate I cut the other day. I was a bit surprised at the interior of this one. I loved the patterns on the exterior and was really curious to see what the interior looked like... I know it's not, but it really reminded me of the interior of coprolite. Cool patterns, and an interesting shape. This one really took me by surprise. I wasn't expecting that kind of a look to the interior at all! I could have tumbled this one, but I would have had to cut a pretty good sized chunk off the side. So, I opted to slab it. I think it might produce a couple decent cabs, but we'll see. |
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Post by stephan on Feb 12, 2021 1:11:29 GMT -5
Cool patterns, and an interesting shape. This one really took me by surprise. I wasn't expecting that kind of a look to the interior at all! I could have tumbled this one, but I would have had to cut a pretty good sized chunk off the side. So, I opted to slab it. I think it might produce a couple decent cabs, but we'll see. Fingers crossed. I’m a sucker for re speckles. Should be cool! |
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Post by jasoninsd on Feb 12, 2021 1:24:38 GMT -5
This one really took me by surprise. I wasn't expecting that kind of a look to the interior at all! I could have tumbled this one, but I would have had to cut a pretty good sized chunk off the side. So, I opted to slab it. I think it might produce a couple decent cabs, but we'll see. Fingers crossed. I’m a sucker for re speckles. Should be cool! I'm putting the heel cut into "the" box...it's not big, but enough for one cab. |
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Post by stephan on Feb 12, 2021 2:10:32 GMT -5
Fingers crossed. I’m a sucker for re speckles. Should be cool! I'm putting the heel cut into "the" box...it's not big, but enough for one cab. Nice! |
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wpotterw
spending too much on rocks
Member since September 2016
Posts: 446 
Member is Online
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Post by wpotterw on Feb 12, 2021 9:28:19 GMT -5
RickB and amygdule You guys had posted pics of worm colonies. I find a lot of this material out here at Railroad Buttes. Usually I find it with the tubes empty, but this last time I found a piece with what looks like a quartz material in the tubes. Do you guys think this material is worm colony? The first pic shows a typical example I find with the empty tubes. The other pics are of the newest piece. Top pick looks like a sponge |
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Post by RickB on Feb 12, 2021 9:42:59 GMT -5
Jason, here's some close-up photos - your sample first and my sample second. The structures just don't look the same to me. I know my sample and Dule's are fission worm colonies but don't know what yours might be.   |
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Post by jasoninsd on Feb 12, 2021 10:22:45 GMT -5
RickB - Dang, I thought they looked real close until you zoomed in like that. Maybe I need a stronger prescription for my reading glasses! LOL - Maybe wpotterw has got it nailed with it being a sponge. The tubes in the stuff I find are very linear as compared to the zoomed in pic of yours. I do find quite a bit of Horn Corral in that area, so I suppose sponge would be sticking with the "theme"...
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Post by RickB on Feb 12, 2021 11:33:31 GMT -5
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Post by jasoninsd on Feb 12, 2021 11:38:06 GMT -5
Thanks for posing this link Rick.  They really had some great examples of sponges...but none of them really resembled what I keep finding. (At least not to my eye.) There was one example "Marine sponge fossils in limestone rock used to build the Convent of St Francis of Asisi, Havana Cuba" that looked close at first, but then I changed my mind on the similarity. LOL I've got some other unidentified finds which I need to take down to the geology department at SDSM&T. I'll need to include a couple of these finds to see if they can maybe positively ID them... |
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Post by jasoninsd on Feb 12, 2021 11:48:15 GMT -5
You're working overtime here Rick! I've never run across that Alamy website before. It's pretty awesome. I did look at those and they did look close. Then I put "fossilized coral South Dakota" in the search. It brought up one example and it was a tumbled piece of Syringopora coral. So I googled that. I saw several examples that I think look like the majority of the stuff I find. Normally it has a light brown tone to the colorization of the material. I really think Syringopora coral is a positive ID on this stuff! |
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Post by RickB on Feb 12, 2021 11:57:30 GMT -5
Sure looks like it. "Winner winner, chicken dinner"
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- I made sure I prefaced what I said with the caveat I had no business answering it from a technical standpoint! LOL
