docdutronc Posted November 27, 2008 Share Posted November 27, 2008 sigillaria barks and syringodendron ,likely Sigillaria tessellata, the leave cushions are contiguous,the ribs have no relief and they are narrow .... sigillaria barks and syringodendron ,likely Sigillaria laevigata , the leave cushions are distant between them , the ribs are wide .... Link to comment Share on other sites More sharing options...
mommabetts Posted November 27, 2008 Share Posted November 27, 2008 Most impressive, you collection of specimens are amazing. Link to comment Share on other sites More sharing options...
tracer Posted November 28, 2008 Share Posted November 28, 2008 are you sealing those specimens with something, and, if so, might i ask what? Link to comment Share on other sites More sharing options...
docdutronc Posted November 28, 2008 Author Share Posted November 28, 2008 are you sealing those specimens with something, and, if so, might i ask what? All my fossils have a serial number and number of deposit example 1055 T76 sample number 1055 on tip ( terril in french ) number 76 Link to comment Share on other sites More sharing options...
Auspex Posted November 28, 2008 Share Posted November 28, 2008 What do you use to preserve your fossils? "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...
docdutronc Posted November 28, 2008 Author Share Posted November 28, 2008 What do you use to preserve your fossils? Hi Auspex Nothing only many regards ,sometimes "hair spray" to give contrast .... Link to comment Share on other sites More sharing options...
mommabetts Posted November 29, 2008 Share Posted November 29, 2008 Hi AuspexNothing only many regards ,sometimes "hair spray" to give contrast .... Do you not have a problem with the shale cracking as it drys out? I know that the shale from my area starts to crack when it has been drying for a few weeks. Link to comment Share on other sites More sharing options...
docdutronc Posted November 29, 2008 Author Share Posted November 29, 2008 Do you not have a problem with the shale cracking as it drys out? I know that the shale from my area starts to crack when it has been drying for a few weeks. Hy Mommabetts I have no problem with red shales ,they are stable ,sometimes when a crach appears I put in cyanolit glue ... bruno Link to comment Share on other sites More sharing options...
docdutronc Posted November 29, 2008 Author Share Posted November 29, 2008 Hy MommabettsI have no problem with red shales ,they are stable ,sometimes when a crach appears I put in cyanolit glue ... bruno A curious syringodendron the leaf cushion is soldered .....,the second sample is more classic we can see two leave cushions ..... Link to comment Share on other sites More sharing options...
Auspex Posted November 29, 2008 Share Posted November 29, 2008 A curious syringodendron the leaf cushion is soldered .....,the second sample is more classic we can see two leave cushions ..... My thinking (which has no basis in actual knowledge) is that there must be many unrecognized species of coal-swamp trees, and that description of them is complicated by the varying morphology from different parts of the same plant. Such a rich environment must have had many niches to fill... "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...
docdutronc Posted November 29, 2008 Author Share Posted November 29, 2008 My thinking (which has no basis in actual knowledge) is that there must be many unrecognized species of coal-swamp trees, and that description of them is complicated by the varying morphology from different parts of the same plant. Such a rich environment must have had many niches to fill... I find an explication to the varying morphology of the syringodendron ,the vascular bundles are single (one ) then separats in two vascular bundles .... The circular structures on this sigillaria specimen are traces of vascular bundles (veins) that serve the leaves. The surface of this specimen has been eroded (decorticated) which results in these structures (parichnos) appearing abnormally large. Sigillaria specimens of this type are assigned to the form genus syringodendron , so the depth of the decortication explains the varying morphology of the sample .... Bruno Link to comment Share on other sites More sharing options...
docdutronc Posted November 30, 2008 Author Share Posted November 30, 2008 A curious syringodendron the leaf cushion is soldered .....,the second sample is more classic we can see two leave cushions ..... Subsigillaria without rib ,in syringodendron form.... Link to comment Share on other sites More sharing options...
Auspex Posted November 30, 2008 Share Posted November 30, 2008 Erecting "form genera" is a useful step in the classification process, but can be confusing (doubly so for initiates who are not familiar with the distinction). Forum discussion has touched on this in the past, most recently in a thread about shark's tooth identification, and one about trace fossils. Casual students assume that if something has a binomial classification, it is a discrete species. I see that, especially in paleobotany, in-depth knowledge such as yours is the only route to fully understanding the ecosystem. "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...
tracer Posted November 30, 2008 Share Posted November 30, 2008 Erecting "form genera" is a useful step in the classification process, but can be confusing (doubly so for initiates who are not familiar with the distinction). Forum discussion has touched on this in the past, most recently in a thread about shark's tooth identification, and one about trace fossils. Casual students assume that if something has a binomial classification, it is a discrete species. I see that, especially in paleobotany, in-depth knowledge such as yours is the only route to fully understanding the ecosystem. i totally agree, and i think my reasons for agreeing are sufficiently obvious that i don't need to articulate them. Link to comment Share on other sites More sharing options...
docdutronc Posted December 1, 2008 Author Share Posted December 1, 2008 In the succession of genus forms Syringodendron,let me show some variant barks from Lievin Link to comment Share on other sites More sharing options...
docdutronc Posted December 1, 2008 Author Share Posted December 1, 2008 onother variants .... Link to comment Share on other sites More sharing options...
docdutronc Posted December 1, 2008 Author Share Posted December 1, 2008 another variants ...... Link to comment Share on other sites More sharing options...
docdutronc Posted December 1, 2008 Author Share Posted December 1, 2008 Some sigillaria barks in black shales ..... Link to comment Share on other sites More sharing options...
mommabetts Posted December 2, 2008 Share Posted December 2, 2008 Thank you for sharing your fossils and knowledge with us!!!!!!!! Link to comment Share on other sites More sharing options...
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