TRKansas Posted January 25, 2019 Share Posted January 25, 2019 Cant figure out what's embedded in this rock. Anybody know? The 3rd Pic is of a different rock found in the same area with a similar pattern on it. Found in Riley Co, KS - Flint hills Link to comment Share on other sites More sharing options...
caldigger Posted January 25, 2019 Share Posted January 25, 2019 Looks to be bryozoa. 6 Link to comment Share on other sites More sharing options...
Ludwigia Posted January 25, 2019 Share Posted January 25, 2019 The light colored ones with the oblong forms in them appear to be bryozoans. The larger wavy forms in the first 2 photos look more sedimentary. 3 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
The Amateur Paleontologist Posted January 25, 2019 Share Posted January 25, 2019 I agree, definitely bryozoan -Christian 1 Opalised fossils are the best: a wonderful mix between paleontology and mineralogy! Q. Where do dinosaurs study? A. At Khaan Academy!... My ResearchGate profile Link to comment Share on other sites More sharing options...
Rockwood Posted January 25, 2019 Share Posted January 25, 2019 I think the bryozoans are fenestrates. The pattern of sedimentation pattern looks like sand migrating downslope in a current. Like in a delta front. @ynot Is a sediment guy. 2 Link to comment Share on other sites More sharing options...
abyssunder Posted January 25, 2019 Share Posted January 25, 2019 The strange features may be close to small-scale heterogeneities (crossbedding) / fluid flow, etc. similar specimen in an older topic - 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
ynot Posted January 26, 2019 Share Posted January 26, 2019 What Abbysunder said. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Innocentx Posted January 26, 2019 Share Posted January 26, 2019 I've seen this wavy feature in lots of flint/chert and had thought it was algal or microbial in origin, and that it grew in spaces between already hardened material. Is that a possibility as well? @abyssunder "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
Innocentx Posted January 26, 2019 Share Posted January 26, 2019 I'm quoting @westcoast from post "mystery beach pebble" where he questions the trough cross bedding . "While I agree that it does look like trough cross bedding I'm concerned that the size is unusually small , i don't see any sedimentary grains and also a number of the troughs appear to have a secondary inner trough. The separating thin layers are also unusually thin and even." I don't think the small size thing was completely explained, and I did read the papers. Could these be microbially induced structures? "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
TRKansas Posted January 26, 2019 Author Share Posted January 26, 2019 50 minutes ago, Innocentx said: I'm quoting @westcoast from post "mystery beach pebble" where he questions the trough cross bedding . "While I agree that it does look like trough cross bedding I'm concerned that the size is unusually small , i don't see any sedimentary grains and also a number of the troughs appear to have a secondary inner trough. The separating thin layers are also unusually thin and even." I don't think the small size thing was completely explained, and I did read the papers. Could these be microbially induced structures? This is the other side and the ends, if that interests anyone. Link to comment Share on other sites More sharing options...
Rockwood Posted January 26, 2019 Share Posted January 26, 2019 6 hours ago, Innocentx said: I'm quoting @westcoast from post "mystery beach pebble" where he questions the trough cross bedding . "While I agree that it does look like trough cross bedding I'm concerned that the size is unusually small , i don't see any sedimentary grains and also a number of the troughs appear to have a secondary inner trough. The separating thin layers are also unusually thin and even." I don't think the small size thing was completely explained, and I did read the papers. Could these be microbially induced structures? This one does, to my eye at least, have sedimentary grains. The bryozoan also appears to be closer to the same density/drag coefficient as the darker silty layer of background sedimentation. 1 Link to comment Share on other sites More sharing options...
Rockwood Posted January 26, 2019 Share Posted January 26, 2019 12 hours ago, abyssunder said: The strange features may be close to small-scale heterogeneities (crossbedding) / fluid flow, etc. I'm guessing the scale would represent a function of particle size, slope angle, and flow rate ? Link to comment Share on other sites More sharing options...
ynot Posted January 26, 2019 Share Posted January 26, 2019 4 hours ago, Rockwood said: I'm guessing the scale would represent a function of particle size, slope angle, and flow rate ? All those and turbidity. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted January 26, 2019 Share Posted January 26, 2019 22 minutes ago, ynot said: All those and turbidity. Ah! Amperage. Link to comment Share on other sites More sharing options...
Innocentx Posted January 26, 2019 Share Posted January 26, 2019 So what does this mean for the possibility of being microbially induced structure? Yes? or no? "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
Rockwood Posted January 26, 2019 Share Posted January 26, 2019 40 minutes ago, Innocentx said: So what does this mean for the possibility of being microbially induced structure? Yes? or no? I think nothing is a better answer. That would have to be a separate line of reasoning. I don't know enough about microbial structure to say what that might be though. 1 Link to comment Share on other sites More sharing options...
ynot Posted January 26, 2019 Share Posted January 26, 2019 3 hours ago, Innocentx said: So what does this mean for the possibility of being microbially induced structure? Yes? or no? I'll go with no on the microbial structure. Just does not seem right for something that forms mats and tends to grow in stagnant environments. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Rockwood Posted January 26, 2019 Share Posted January 26, 2019 25 minutes ago, ynot said: stagnant environments. Intermittently ? Represented by the darker dividing layers ? 1 Link to comment Share on other sites More sharing options...
ynot Posted January 26, 2019 Share Posted January 26, 2019 13 minutes ago, Rockwood said: Intermittently ? Represented by the darker dividing layers ? I don't see it that way. I doubt this pattern could be formed in a stagnant environment - intermittent or not. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
abyssunder Posted January 26, 2019 Share Posted January 26, 2019 20 hours ago, Innocentx said: I've seen this wavy feature in lots of flint/chert and had thought it was algal or microbial in origin, and that it grew in spaces between already hardened material. Is that a possibility as well? I don't think it has a microbial origin or these features have something in common with microbially induced structures. 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Rockwood Posted January 26, 2019 Share Posted January 26, 2019 4 hours ago, Rockwood said: That would have to be a separate line of reasoning. Never said there was one. Link to comment Share on other sites More sharing options...
Innocentx Posted January 27, 2019 Share Posted January 27, 2019 I like mysteries. I'll have to do some magnification on my samples and look for sedimentary grains, etc. Thanks for efforts to clear this up, guys. I may very well end up in agreement. "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
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