docdutronc Posted August 23, 2009 Share Posted August 23, 2009 Hi Lepidodendron barks may show several conditions of fossilization, the bark is composed of several layers, depending on the depth of decortication, there is aspidiaria which shows the contours shaped diamond stretched vertically, and the deepest knorria which leaves appear only trace veins bringing the sap to the leaf scar to feed the leaf ..... the best known are counterparts , showing fine leaf scars, the lower layers of bark are difficult to harvest and are often buried in the coal, here's a knorria after cleaning ..... Link to comment Share on other sites More sharing options...
Auspex Posted August 23, 2009 Share Posted August 23, 2009 Making sense of Lepidodendron barks is a little like peeling an onion (without the tears). The challenge in associating the different named 'species' seems to be the ability to recognize small details. I hope someday to finally "get it" "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 August 23, 2009 Author Share Posted August 23, 2009 Making sense of Lepidodendron barks is a little like peeling an onion (without the tears). The challenge in associating the different named 'species' seems to be the ability to recognize small details.I hope someday to finally "get it" Hi Auspex It's very easy when you fends shale, a Lepidodendron on one side and a Decortication on the other side , is a different story when you find the pieces separately ,the puzzle is more difficult ....this morning I was lucky, there was that on one side and the other that .... Link to comment Share on other sites More sharing options...
RomanK Posted August 23, 2009 Share Posted August 23, 2009 HiLepidodendron barks may show several conditions of fossilization, the bark is composed of several layers, depending on the depth of decortication, there is aspidiaria which shows the contours shaped diamond stretched vertically, and the deepest knorria which leaves appear only trace veins bringing the sap to the leaf scar to feed the leaf ..... the best known are counterparts , showing fine leaf scars, the lower layers of bark are difficult to harvest and are often buried in the coal, here's a knorria after cleaning ..... Thanks Bruno, very interesting and educational as usual. Is this lepidodendron or aspidaria bark? Thanks, Roman Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
docdutronc Posted August 23, 2009 Author Share Posted August 23, 2009 Thanks Bruno, very interesting and educational as usual.Is this lepidodendron or aspidaria bark? Thanks, Roman Hi Roman no this bark is a counterpart,Lepidodendron barks,in reality lepidodendron is like this one .... Link to comment Share on other sites More sharing options...
RomanK Posted August 23, 2009 Share Posted August 23, 2009 Hi Roman no this bark is a counterpart,Lepidodendron barks,in reality lepidodendron is like this one .... Thanks Bruno. Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
Nicholas Posted August 23, 2009 Share Posted August 23, 2009 Brilliant specimens, you have a lot of museum quality pieces there. Link to comment Share on other sites More sharing options...
Terry Dactyll Posted August 23, 2009 Share Posted August 23, 2009 Bruno..... fabulous!.........No wonder your called Mr Tree .... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Auspex Posted August 23, 2009 Share Posted August 23, 2009 Hi Roman no this bark is a counterpart,Lepidodendron barks,in reality lepidodendron is like this one .... Not only are there different layers of bark, and barks of different maturity, there are also positive and negative preservations "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 August 23, 2009 Author Share Posted August 23, 2009 Not only are there different layers of bark, and barks of different maturity, there are also positive and negative preservations Hi Auspex Combinations are numerous, Paleobotany is not easy ,that is for this reason arborescent lepidophytes fascinates me !most especially the genius Lepidodendron ..... bruno Link to comment Share on other sites More sharing options...
Terry Dactyll Posted August 23, 2009 Share Posted August 23, 2009 Bruno..... Im having a guess here, but learning lots....... ... This specimen might be a very basal specimen from the trunk of a Lepidodendron tree, but I also think it could be the 'couterpart ' or 'negative'..... It may be too small a section for a positive ID.... but could you take a look....Thanks.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
docdutronc Posted August 23, 2009 Author Share Posted August 23, 2009 Bruno..... Im having a guess here, but learning lots....... ... This specimen might be a very basal specimen from the trunk of a Lepidodendron tree, but I also think it could be the 'couterpart ' or 'negative'..... It may be too small a section for a positive ID.... but could you take a look....Thanks.... Steve It is a 3 D ? , there is a very fine decoration but no scars, some furrows , it may be a decortication of bothrodendron...,bothrodendron minutifolium Link to comment Share on other sites More sharing options...
Terry Dactyll Posted August 24, 2009 Share Posted August 24, 2009 Bruno...... Thanks once again..... your a wealth of Knowledge.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Guest solius symbiosus Posted August 24, 2009 Share Posted August 24, 2009 Steve It is a 3 D ? , there is a very fine decoration but no scars, some furrows , it may be a decortication of bothrodendron...,bothrodendron minutifolium I have some Bothrodendron, and Ulodendron, somewhere. I will try to locate it. Link to comment Share on other sites More sharing options...
grandpa Posted August 24, 2009 Share Posted August 24, 2009 Bruno, I have some bark and leave samples that I've picked up in N. Central Texas, Penn. Period, Mangus Fm. Do you know of any good ID books that might help me ID what I have? Link to comment Share on other sites More sharing options...
Auspex Posted August 24, 2009 Share Posted August 24, 2009 Bruno,I have some bark and leave samples that I've picked up in N. Central Texas, Penn. Period, Mangus Fm. Do you know of any good ID books that might help me ID what I have? You didn't really think that no one would ask to see pics of them, did you? "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...
grandpa Posted August 24, 2009 Share Posted August 24, 2009 OK, I'll get some pictures up, but it will take a while. The fossils are not here at home. Link to comment Share on other sites More sharing options...
Auspex Posted August 24, 2009 Share Posted August 24, 2009 OK, I'll get some pictures up, but it will take a while. The fossils are not here at home. Just a little good-natured ragging I would love to see them though, at your convenience "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...
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