docdutronc Posted October 11, 2012 Share Posted October 11, 2012 (edited) Hi Hitekmastr quote : " simply be flattened and pointed downward" Pointed downward on the trunk, this condition may be the result of compression of the plant during fossilization, however, the presence of large scars (scar petiole) indicates an area near the branches and foliage , Hagiophyton this copy, there is practically no deformation, the trunk portion is preserved in 3D and has not undergone pressure and was fossilized in situ, adventitious roots are pointing down. Best regards Bruno http://forums-natura...631-hagiophyton Edited October 11, 2012 by docdutronc Link to comment Share on other sites More sharing options...
Terry Dactyll Posted October 12, 2012 Share Posted October 12, 2012 ...not to mention that we are talking about millions of years and different climates and maybe adaptations to subtle climate changes that may not be apparent in the geology. When talking about a "narrow" geological period such as late Carboniferous, we're still talking about millions of years which allows for a lot of variation. Bird beaks can evolve differently in one season. Fern bark could be varying, given the times, although as many point out, "unforced" morphologies appear to remain intact pretty much indefinitely. And the variations in each tree (different leaves on the same tree for example and different bark patterns on the same tree) adds to the formula. We all expect things to be simple and complexity in biology is more the rule than exception! Your right... Were trying to 'pigeon hole' and make some sense of a vast period of time where untold changes infact could of took place very gradually... This was always one of my favourite leaf's...When collecting was tough going and the nodules hard to find and thin on the ground I used to go collecting anyways and break down 'likely' looking blocks of shale hoping for a decent nodule or two...the rewards are still there if you can adapt your approach sometimes and pretty quickly you learn another way and get your eye in to avoid wasting too much time....These two were laid as they are...Hans Steur took the image when he came collecting with me for his website.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
hitekmastr Posted October 12, 2012 Share Posted October 12, 2012 Your right... Were trying to 'pigeon hole' and make some sense of a vast period of time where untold changes infact could of took place very gradually... This was always one of my favourite leaf's...When collecting was tough going and the nodules hard to find and thin on the ground I used to go collecting anyways and break down 'likely' looking blocks of shale hoping for a decent nodule or two...the rewards are still there if you can adapt your approach sometimes and pretty quickly you learn another way and get your eye in to avoid wasting too much time....These two were laid as they are...Hans Steur took the image when he came collecting with me for his website.... Ah - now THIS is really cool! This is one of the clearest outlines of the "trunk leaf" I've seen - ironic that it came from adjusting your technique. Nan and I have been experimenting with various approaches and always trying different techniques - this post is a terrific example of why I always say that cracking rocks to find fossils is like opening a box of Cracker Jack. Link to comment Share on other sites More sharing options...
hitekmastr Posted October 12, 2012 Share Posted October 12, 2012 Hi Hitekmastr quote : " simply be flattened and pointed downward" Pointed downward on the trunk, this condition may be the result of compression of the plant during fossilization, however, the presence of large scars (scar petiole) indicates an area near the branches and foliage , Hagiophyton this copy, there is practically no deformation, the trunk portion is preserved in 3D and has not undergone pressure and was fossilized in situ, adventitious roots are pointing down. Best regards Bruno http://forums-natura...631-hagiophyton Slowly...sometimes very slowly...but inexorably...these extinct species are coming alive...every picture, every comment, every analysis adds depth and restores life to these extinct species. When Nan and I visit St. Clair, we feel like we are standing on a levee or island in the original coal swamp - it's eerie. How did all of these species disappear in a geologically short space of time? What details are we missing? Where are the insects, amphibians and small reptiles that should have been living in the swamp? What is the meaning of some ash and roots I discovered (at St. Clair) that are pretty clear evidence of a paleo-era fire? Lots more questions than answers! A few years ago I earned a grad. degree in environmental studies and of course, global climate change and extinction events are very interesting to me as we try to understand the current (6th) extinction event. Presumably, a mix of wet environments drying up and atmospheric changes - maybe complicated by temperature and ice ages - sealed the fate of these species, but also paved the way for seeds and flowers and so on. When we started looking at fossils, we thought plants and trees would be boring - but Nancy mentioned to me the other day that we never could have predicted how interesting and historically/environmentally relevant this area can be. Link to comment Share on other sites More sharing options...
Auspex Posted October 12, 2012 Share Posted October 12, 2012 Understanding the scale of time represented in the snapshots (of exposed fossiliferous deposits) is very difficult, given our perspective (measured in human generations). The Carboniferous coal swamps are known to have undergone numerous transgressions and regressions through fluctuating sea levels; how long did they last, and are all even represented in the geologic record? The rate of a period's evolution and extinction is often deducible only in relation to those of other (often imperfectly recorded) periods; constant inquiry is our best tool to refine understanding. "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...
Terry Dactyll Posted October 13, 2012 Share Posted October 13, 2012 (edited) Auspex...We may never have ALL the answers but its very enjoyable seeing what pieces of the jigsaw we have found...and the best part is, things are slightly different at each site and then trying to put one site into context with another helps and extends your understanding...Its a great period to collect the upper carboniferous, accessible to lots of people from many countries... it certainly gets some very good discussions going on TFF...Keep them specimens coming guys...I will shortly be back out collecting plant myself if things go to plan .... Edited October 13, 2012 by Terry Dactyll Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
pecopteris Posted October 20, 2012 Share Posted October 20, 2012 Nice find! "PECO" (Pecopteris) - I specialize in Carboniferous fossils. I have a wide array of plants. In my collection at the moment: Ferns, Calamites, Syringodendron, Aspidaria and Sigillaria. Link to comment Share on other sites More sharing options...
docdutronc Posted October 22, 2012 Share Posted October 22, 2012 Calamites ,external bark ......from Liévin basin Bruno Link to comment Share on other sites More sharing options...
itwasntme Posted October 22, 2012 Share Posted October 22, 2012 Stigmaria (Lepidodendron root?) I just really liked this specific specimen because it is the first I have found where you can see the vasular tube that runs down the center (you can see it in the first pic), and it is visible on both ends of this specimen. Link to comment Share on other sites More sharing options...
docdutronc Posted October 24, 2012 Share Posted October 24, 2012 Hi Itwasntme quote : " Stigmaria (Lepidodendron root?) I just really liked this specific specimen because it is the first I have found where you can see the vasular tube that runs down the center (you can see it in the first pic), and it is visible on both ends of this specimen." great find with its central cylinder preserved, congratulations here a link to my findings among the Stigmaria and some plates to identify these roots .... Best regards Bruno http://forums-naturalistes.forums-actifs.com/t4340-stigmaria-ficoides-sternberg Link to comment Share on other sites More sharing options...
itwasntme Posted October 26, 2012 Share Posted October 26, 2012 Hey guys/gals, I found this today while digging around, its calamites but never seen the seam/line up the middle like this, it has the same ridges as the rest of the specimen? Link to comment Share on other sites More sharing options...
Auspex Posted October 26, 2012 Share Posted October 26, 2012 ...its calamites but never seen the seam/line up the middle like this, it has the same ridges as the rest of the specimen? It is a compressed fossil, yes? I believe what you have exposed is the pith. "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...
itwasntme Posted October 26, 2012 Share Posted October 26, 2012 Very possibly so, I found an area at my office that had dozer/excavator work done on the property about 3 years ago and today when outside I noticed a small piece of that sticking out of the side of the cliff and started TRYING to dig around it carefully but didn't do so good a job, some of the length off of it. . I noticed several specimens in the same area but not sure how to dig around and get it out without damaging the specimen, if I were to post a pic of the area u think someone could give some pointers for a newbie or should I research it elsewhere for diggin it out? Link to comment Share on other sites More sharing options...
Auspex Posted October 27, 2012 Share Posted October 27, 2012 ...if I were to post a pic of the area u think someone could give some pointers for a newbie or should I research it elsewhere for diggin it out? Can't hurt to try! Along with the pictures, describe as best you can the character of the entombing matrix. "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 27, 2012 Share Posted October 27, 2012 (edited) Edited October 27, 2012 by RomanK Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
docdutronc Posted October 27, 2012 Share Posted October 27, 2012 (edited) Nice close ups Roman !!!! Here is some Calamites bark , mold of the internal cavity ..... Quote : Itwasntme " its calamites but never seen the seam/line up the middle like this " A 3 d mold , the complete compression and the partial compression, with a longitudinal crack due to the pressure best regards Bruno Edited October 27, 2012 by docdutronc Link to comment Share on other sites More sharing options...
RomanK Posted October 27, 2012 Share Posted October 27, 2012 Nice close ups Roman !!!! Here is some Calamites bark , mold of the internal cavity ..... Quote : Itwasntme " its calamites but never seen the seam/line up the middle like this " A 3 d mold , the complete compression and the partial compression, with a longitudinal crack due to the pressure best regards Bruno Thank you Bruno! Like your pictures, especially the Calamites mold with converging ribs! Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
hitekmastr Posted October 29, 2012 Share Posted October 29, 2012 Roman! These REALLY bring these fossils, trees and textures to life! I can't stop looking at these images, they are absolutely mesmerizing, the detail is amazing. I keep coming back to this set of images - these make you feel like being present looking at the original trees. Terrific. Link to comment Share on other sites More sharing options...
RomanK Posted October 29, 2012 Share Posted October 29, 2012 (edited) Roman! These REALLY bring these fossils, trees and textures to life! I can't stop looking at these images, they are absolutely mesmerizing, the detail is amazing. I keep coming back to this set of images - these make you feel like being present looking at the original trees. Terrific. Thank you hitekmastr! One bark more (Asolanus camptotaenia) Edited October 29, 2012 by RomanK Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
docdutronc Posted October 29, 2012 Share Posted October 29, 2012 quote : " I keep coming back to this set of images........" take care Hitekmastr ,addictivity , is a serious difficultie to get rid of ...... :rofl: Bruno Link to comment Share on other sites More sharing options...
RomanK Posted October 30, 2012 Share Posted October 30, 2012 Sigillaria Stigmaria Lepidodendron Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
Rockin' Ric Posted October 30, 2012 Share Posted October 30, 2012 Nice close ups Roman !!!! Here is some Calamites bark , mold of the internal cavity ..... Quote : Itwasntme " its calamites but never seen the seam/line up the middle like this " A 3 d mold , the complete compression and the partial compression, with a longitudinal crack due to the pressure best regards Bruno Really like these Calamites! Nicely detailed! WELCOME TO ALL THE NEW MEMBERS! If history repeats itself, I'm SO getting a dinosaur. ~unknown www.rockinric81.wixsite.com/fossils Link to comment Share on other sites More sharing options...
RomanK Posted October 31, 2012 Share Posted October 31, 2012 Probably Calamophyllites - outer bark of Calamites Roman http://s1143.photobu.../donbassfossil/ Link to comment Share on other sites More sharing options...
docdutronc Posted November 3, 2012 Share Posted November 3, 2012 (edited) Hi my friends Megaphyton from Liévin basin ,this trunks fern shows two opposed rows with big petiolar scars best regards Bruno Edited November 4, 2012 by docdutronc Link to comment Share on other sites More sharing options...
AgrilusHunter Posted November 3, 2012 Share Posted November 3, 2012 Those are some seriously BIG petioles! "They ... savoured the strange warm glow of being much more ignorant than ordinary people, who were only ignorant of ordinary things." -- Terry Pratchett Link to comment Share on other sites More sharing options...
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