Ludwigia Posted March 5, 2020 Share Posted March 5, 2020 A couple of weeks ago I posted here about the working of chemical erosion on some ammonites which I had found in a furrow between 2 fields. I went back there again this week and continued along, pulling out a few more. The furrow dipped down a bit into a sort of hollow where it became obvious that the water had collected there more profusely than above over the years and the finds became more and more eroded until it reached the point where the digging was hardly worth it any more. There were however a couple of quite interesting finds which I'd like to post here. They derive from Macrocephalites ammonites, but have been eroded away to such a point that the (usually invisible) septal chambers and walls can be seen right into the center. 16 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Randyw Posted March 5, 2020 Share Posted March 5, 2020 Really cool examples! Link to comment Share on other sites More sharing options...
Ludwigia Posted March 5, 2020 Author Share Posted March 5, 2020 16 minutes ago, Randyw said: Really cool examples! The first one looks sorta like a mandala sun. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
FossilNerd Posted March 6, 2020 Share Posted March 6, 2020 Now that’s something you don’t see everyday! Being in such an eroded state, they may not be the most beautiful ammonites, but they sure are some of the most interesting I’ve ever seen. The good thing about science is that it's true whether or not you believe in it. -Neil deGrasse Tyson Everyone you will ever meet knows something you don't. -Bill Nye (The Science Guy) Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 6, 2020 Share Posted March 6, 2020 @Ludwigia Are these ammonites replaced with quartz? I love imperfect fossils that show internal structure. 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Bobby Rico Posted March 6, 2020 Share Posted March 6, 2020 They are really beautiful, interesting thread. I am going to keep my eye out for one. Link to comment Share on other sites More sharing options...
Ludwigia Posted March 6, 2020 Author Share Posted March 6, 2020 8 hours ago, FossilNerd said: Now that’s something you don’t see everyday! Being in such an eroded state, they may not be the most beautiful ammonites, but they sure are some of the most interesting I’ve ever seen. That's the main reason I posted them 7 hours ago, DPS Ammonite said: @Ludwigia Are these ammonites replaced with quartz? I love imperfect fossils that show internal structure. Calcite. 7 hours ago, Bobby Rico said: They are really beautiful, interesting thread. I am going to keep my eye out for one. The Jurassic coast, eg., may have some available in the Middle Jurassic sections. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Shamalama Posted March 6, 2020 Share Posted March 6, 2020 The second one reminds me of a Pleurodictyum coral colony. But alas, the Mesozoic does not have any tabulate corals. Great specimens just the same. -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
dinosaur man Posted March 6, 2020 Share Posted March 6, 2020 Amazing finds!! Link to comment Share on other sites More sharing options...
Ludwigia Posted March 6, 2020 Author Share Posted March 6, 2020 1 hour ago, Shamalama said: The second one reminds me of a Pleurodictyum coral colony. But alas, the Mesozoic does not have any tabulate corals. Great specimens just the same. I think I see what you mean. 1 hour ago, dinosaur man said: Amazing finds!! Thanks 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ruger9a Posted March 7, 2020 Share Posted March 7, 2020 On 3/5/2020 at 6:02 PM, Ludwigia said: A couple of weeks ago I posted here about the working of chemical erosion on some ammonites which I had found in a furrow between 2 fields. I went back there again this week and continued along, pulling out a few more. The furrow dipped down a bit into a sort of hollow where it became obvious that the water had collected there more profusely than above over the years and the finds became more and more eroded until it reached the point where the digging was hardly worth it any more. There were however a couple of quite interesting finds which I'd like to post here. They derive from Macrocephalites ammonites, but have been eroded away to such a point that the (usually invisible) septal chambers and walls can be seen right into the center. These are the kind of unique fossils I am always attracted to. Common fossils but with a very unique twist to them making them "eye catching". Thanks for posting. 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted March 7, 2020 Share Posted March 7, 2020 Rather splendid looking fossils. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
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