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Post by jasoninsd on Dec 14, 2020 21:30:43 GMT -5
Man oh man - thank you for all those links you provided here! I'll mess around with the Geologic Database for sure! I clicked on the Pierre Shale google link. It led me to a Didymoceras Nebracense. What I took as an ammonite imprint in one of my rocks, and in fact some what I took as ammonite pieces (pics 3-7 in this post: forum.rocktumblinghobby.com/post/1138309/thread) could very well be Didymoceras Nebracense rather than ammonite. Here's a link I found for the Didymoceras Nebracense (click on images to bring up photos): www.cretaceousatlas.org/species/didymoceras-nebrascense/ |
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Post by amygdule on Dec 14, 2020 21:51:46 GMT -5
Man oh man - thank you for all those links you provided here! I'll mess around with the Geologic Database for sure! I clicked on the Pierre Shale google link. It led me to a Didymoceras Nebracense. What I took as an ammonite imprint in one of my rocks, and in fact some what I took as ammonite pieces (pics 3-7 in this post: forum.rocktumblinghobby.com/post/1138309/thread) could very well be Didymoceras Nebracense rather than ammonite. Here's a link I found for the Didymoceras Nebracense (click on images to bring up photos): www.cretaceousatlas.org/species/didymoceras-nebrascense/That sure does look like an oddball creature. Congratulations Happy Hunting ! :) |
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RWA3006
Cave Dweller 
Member since March 2009
Posts: 4,633 
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Post by RWA3006 on Dec 14, 2020 23:00:06 GMT -5
Jason, I have no idea what that rock is, but to me just the shape resembles a pile of poop.  It's a very nice looking pile of poop, though.  Just for the record...it's not "fresh"! LOL I got it wet in the sink prior to the photo shoot. I won't argue your visual impression...although it doesn't really look like any coprolite I've ever seen pics of! RWA3006 - can you confirm this isn't poop? I don't know because I can't think straight since I saw the pretty girl stuck in the mud. What was the question? Oh yeah, well it sure looks like a twisted gob of poo but it's unlike any I'm familiar with. Can you look on a geologic map and see if it's source is Morrison formation or Cretaceous? |
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Post by jasoninsd on Dec 14, 2020 23:15:16 GMT -5
Just for the record...it's not "fresh"! LOL I got it wet in the sink prior to the photo shoot. I won't argue your visual impression...although it doesn't really look like any coprolite I've ever seen pics of! RWA3006 - can you confirm this isn't poop? I don't know because I can't think straight since I saw the pretty girl stuck in the mud. What was the question? Oh yeah, well it sure looks like a twisted gob of poo but it's unlike any I'm familiar with. Can you look on a geologic map and see if it's source is Morrison formation or Cretaceous? Ok, if I'm using the index correctly, South Dakota is located in the Morrison formation (Unkpapa Sandstone Member - Late Jurassic in SD). Whatever this is, I have never seen any "twisted" mass of rock like this one is - ever in this area...and the whole twisted "glob" is what really piqued my interest in this one. |
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Post by stephan on Dec 14, 2020 23:20:43 GMT -5
Here's another beast I found while out hounding last week. Before anyone says anything, I know it's not a fossil! LOL This looks (to my very untrained eye!) like it has pockets of chalcedony throughout the rock. The only reason I picked it up was because it reminded me of NevadaBill 's thread on stromatolites...and no, I don't think it's that either. I don't usually...okay ever...see rocks like this, so of course I had to adopt it! There's no uniformity to it and it's not like any conglomerate I've seen out here. The different "sections" aren't linear per se. They're bent and twisted. It's dimensions of "the beast" are 10"x4"x3". Just thought it was very interesting and very different from the norm I run across...   That would actually make a very cool suiseki. It’s got a very mountain-like look to it. |
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Post by jasoninsd on Dec 14, 2020 23:29:48 GMT -5
Here's another beast I found while out hounding last week. Before anyone says anything, I know it's not a fossil! LOL This looks (to my very untrained eye!) like it has pockets of chalcedony throughout the rock. The only reason I picked it up was because it reminded me of NevadaBill 's thread on stromatolites...and no, I don't think it's that either. I don't usually...okay ever...see rocks like this, so of course I had to adopt it! There's no uniformity to it and it's not like any conglomerate I've seen out here. The different "sections" aren't linear per se. They're bent and twisted. It's dimensions of "the beast" are 10"x4"x3". Just thought it was very interesting and very different from the norm I run across... That would actually make a very cool suiseki. It’s got a very mountain-like look to it. It wouldn't be that difficult to face off the bottom of this and route a nice piece of oak for the base...you might be onto something here! I keep finding myself just studying the pictures and looking at the different "sections" of this piece that are curled/twisted/curved...and truly being fascinated with this thing! I would need to clean it up first...I wonder if it would survive a trip through the dishwasher?  I like your idea!  |
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Post by amygdule on Dec 15, 2020 0:33:18 GMT -5
Ok, if I'm using the index correctly, South Dakota is located in the Morrison formation (Unkpapa Sandstone Member - Late Jurassic in SD). Whatever this is, I have never seen any "twisted" mass of rock like this one is - ever in this area...and the whole twisted "glob" is what really piqued my interest in this one. Where did you find the twisted turd at ? It looks like the Morrison is exposed about 5 miles west of Fairburn. In that dark green area labeled Ju, in the upper left of the map.  |
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Post by jasoninsd on Dec 15, 2020 1:02:28 GMT -5
Ok, if I'm using the index correctly, South Dakota is located in the Morrison formation (Unkpapa Sandstone Member - Late Jurassic in SD). Whatever this is, I have never seen any "twisted" mass of rock like this one is - ever in this area...and the whole twisted "glob" is what really piqued my interest in this one. Where did you find the twisted turd at ? It looks like the Morrison is exposed about 5 miles west of Fairburn. In that dark green area labeled Ju, in the upper left of the map. I hope this shows up. Tapatalk is way easier for me to post pics... This was found on the Cheyenne River, south and east of Fairburn. In this pic, Fairburn is at the top left corner of the shot, and this was found right about where the cursor is pointing. Again though, this was found on the banks of the river, so it could have come from anywhere upstream (which is to the left in the pic)...which there's a lot of green along the river as well.  |
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Post by stephan on Dec 15, 2020 1:19:37 GMT -5
Here's another beast I found while out hounding last week. Before anyone says anything, I know it's not a fossil! LOL  Hold on a sec... before you give up on the fossil... there’s face in there. A petrified baby manatee, perhaps?  seriously, though, from the picture, it seems jasper or chert-like, with quartz in there too. |
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Post by jasoninsd on Dec 15, 2020 1:20:41 GMT -5
I just realized trying to find the cursor in that pic is like "Where's Waldo"! The cursor is down in the bottom right hand corner in the white section...which has to denote the river basin (I'm assuming).
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Post by stephan on Dec 15, 2020 1:22:41 GMT -5
That would actually make a very cool suiseki. It’s got a very mountain-like look to it. It wouldn't be that difficult to face off the bottom of this and route a nice piece of oak for the base...you might be onto something here! I keep finding myself just studying the pictures and looking at the different "sections" of this piece that are curled/twisted/curved...and truly being fascinated with this thing! I would need to clean it up first...I wonder if it would survive a trip through the dishwasher? I like your idea! As for the dishwasher, it’s already brown.... Hot sodium hydroxide could have an effect. Might be better to ID it first, or to omit the detergent. |
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Post by jasoninsd on Dec 15, 2020 1:23:53 GMT -5
Here's another beast I found while out hounding last week. Before anyone says anything, I know it's not a fossil! LOL Hold on a sec... before you give up on the fossil... there’s face in there. A petrified baby manatee, perhaps? seriously, though, from the picture, it seems jasper or chert-like, with quartz in there too. I actually do kinda see that! LOL Nothing looks like chalcedony? Seriously, I feel like I'm never going to get this!!! Arghhhh! |
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Post by stephan on Dec 15, 2020 1:36:30 GMT -5
Hold on a sec... before you give up on the fossil... there’s face in there. A petrified baby manatee, perhaps? seriously, though, from the picture, it seems jasper or chert-like, with quartz in there too. I actually do kinda see that! LOL Nothing looks like chalcedony? Seriously, I feel like I'm never going to get this!!! Arghhhh! Could easily be. Like jasper and agate, chalcedony is cryptocrystaline quartz. Sometimes it is used to refer to stones with a translucency that can be in between the two, and without agate-like banding. You’d be in a better position to determine how it fits into that. Other times, it is used as a broader term that encompasses agate, jasper, chrysoprase and/or “specialty” stones like bloodstone, moss agates there not really agates. One day I’m going to come up with a “crypto-quartz” Venn diagram. Until then, the adage, “if you like it it’s jasper. If you don’t, it’s chert.” |
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Post by amygdule on Dec 15, 2020 1:36:36 GMT -5
I just realized trying to find the cursor in that pic is like "Where's Waldo"! The cursor is down in the bottom right hand corner in the white section...which has to denote the river basin (I'm assuming). I finally found it after zooming in on your picture. Thanks |
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Post by amygdule on Dec 15, 2020 2:06:54 GMT -5
Btw, the green layer down there labeled Kps stands for Cretaceous Pierre Shale. I don't know why they use a K to denote Cretaceous on geologic maps. If you download the "Print Optimized PDF" you can read an explanation of the symbols and a description of the different units and their colors.  |
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Post by stephan on Dec 15, 2020 2:09:45 GMT -5
Btw, the green layer down there labeled Kps stands for Cretaceous Pierre Shale. I don't know why they use a K to denote Cretaceous on geologic maps. If you download the "Print Optimized PDF" you can read an explanation of the symbols and a description of the different units and their colors. Could be from the German “Kreidezeit” — literally “the chalk time.” |
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,633
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Post by RWA3006 on Dec 15, 2020 8:04:55 GMT -5
Look it over with a magnifying glass and see if you can find any structures in the matrix. I've been surprised a few times by doing this. I get the impression it might be a turd from a carnivore but probably a long shot.
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Post by jasoninsd on Dec 15, 2020 8:20:34 GMT -5
Look it over with a magnifying glass and see if you can find any structures in the matrix. I've been surprised a few times by doing this. I get the impression it might be a turd from a carnivore but probably a long shot. Not to sound like more of an imbecile than I already am, when you say "structures", what would the structures be like? I apparently have a tendency to "see" what I'm wanting to see...  (I'm thinking I would "see" those structures as being little dinosaur toes since I'm looking to see if this is carnivore poo...) |
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Post by jasoninsd on Dec 15, 2020 9:01:07 GMT -5
Look it over with a magnifying glass and see if you can find any structures in the matrix. I've been surprised a few times by doing this. I get the impression it might be a turd from a carnivore but probably a long shot. I went to poozeum.com and poo-rused their picture database. I didn't see any carnivore poo that even closely resembled this piece. I looked at it with a magnifying glass and didn't see any inclusions (bone, teeth). So, even though it looks like a pile of crap, I doubt very seriously it is. I'm still curious though as to what could have caused the "bending" and "twisting" of certain sections of the different materials in this rock. If/when I'm able to get down to the geology department at the SM&T, I'm going to take this one as well as some others... |
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Post by hummingbirdstones on Dec 15, 2020 9:30:09 GMT -5
Oh jeez, see what I started?
Ok, so if it was Cretaceous there's a possibility it really is poop. Another one to take to the geologist to see what he thinks.
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(I'm thinking I would "see" those structures as being little dinosaur toes since I'm looking to see if this is carnivore poo...)
