Shamalama Posted October 5, 2009 Share Posted October 5, 2009 This is a odd thing I found a few specimens of while searching around the St. Clair fern site. All are oval shaped (probably due to the rock deformation during uplift) and look like a pucker on the rock with little pin around the edge. Sizes are not consistent not are associations. Any clues on what this might be? Seed or root cross section maybe? Three examples below: -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...
Crinoid Queen Posted October 5, 2009 Share Posted October 5, 2009 No clue but it is neat looking. Link to comment Share on other sites More sharing options...
Auspex Posted October 5, 2009 Share Posted October 5, 2009 Stem cross-section (or impression thereof)? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
RomanK Posted October 5, 2009 Share Posted October 5, 2009 This is a odd thing I found a few specimens of while searching around the St. Clair fern site. All are oval shaped (probably due to the rock deformation during uplift) and look like a pucker on the rock with little pin around the edge. Sizes are not consistent not are associations. Any clues on what this might be? Seed or root cross section maybe? Three examples below: It looks like cross-section of thin stem. Look on my specimen Another possible version thin stigmaria cross-section, but less likely. Anyway interesting finds. Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
RCFossils Posted October 6, 2009 Share Posted October 6, 2009 Yes, it looks to me to be a cross section of a calamites stem. Link to comment Share on other sites More sharing options...
Terry Dactyll Posted October 6, 2009 Share Posted October 6, 2009 Shamalama.....It is a cross section or possibly the position on the stem, where a node occurs, a branch intersection.... I was trying to locate a decent example to photograph, but I cant seem to lay my hands on one... so heres a partial....you can see where I have marked the stem would of continued.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Terry Dactyll Posted October 6, 2009 Share Posted October 6, 2009 I managed to locate a couple of examples showing the 'node' shape, off the stem..... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Shamalama Posted October 6, 2009 Author Share Posted October 6, 2009 So it would be a side node kind of thing? That could make sense... maybe as the plant grew the lower branches died or broke off and it sloughed off the node later. That would explain why there is not any extension through the rock as a branch or stem might show. Interesting... and it's another piece of the puzzle with understanding the paleobiology. :) -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...
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