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Found 23 results

  1. I have found that illuminating photos of cordaites fossils are relatively hard to come by. Hopefully these images will help to rectify the situation. Photos 1 and 2 are of a Cordaites borassifolus Sternberg fossil from the middle Pennsylvanian in Upper Silesia, Poland. I suspect that it is of the trunk and the nice, very fine striations are clearly evident in the close up (Photo2). Photos 3and 4 are of cordaites leaf specimens from the Mazon Creek area that was identified by both helpful Forum members and me. The close up of the Mazon Creek specimen (photo 4) clearly agrees with the literature in that they are strap like leaves, they do not have a prominent central vein and they do have equal, equally spaced veins. The Mazon Creek leaves also appear to be on a branch and sigillarius leaves apparently do not. Photos 5 and 6 are of a fossil from SW Pennsylvania that I have identified as a cordaites fossil. As with the Mazon Creek specimen, it is strap like, it has no prominent central vein and the veins are equal and equally spaced. The quality of the close up in Photo 6 is not the best and you might have better luck enlarging Photo 5.
  2. I have some fossil grass-like leaves from a specimen that was associated with other Pennsylvanian fossils collected from near Middlesboro, Kentucky. The specimen is somewhat problematic for display purposes because it has a very nice mesocalamite fossil on the opposite side. The 1st and 2nd images are of the leaflike fossils with a closeup. The white spots are apparently where reactive iron sulfides have been exposed to atmospheric humidity and were oxidized to some type of iron sulfate. The grasslike leaves do not appear to have a strong central vein which might suggest that these are cordaites leaves. The 3rd image is of the very nice mesocalamite fossil on the opposite side. Suggestions would be greatly appreciated.
  3. I am a retired PhD environmental interface chemist who is also a lifelong fossil enthusiast after growing up in Cincinnati. I have some carboniferous plant fossils for which I would appreciate suggestions from those more knowledgeable than me. Photo1 is from Mazon Creek, IL. The leaves appear to not have a central rib and are arranged in a spray. The leaf in the upper left is interesting. These leaves are nothing like the lepidostrobus ovatifolius in Photo 2 or the lepidodendron "cone" in Photo 3 (both from Kentucky). They also appear to be too big for sigillarius leaves. Is it likely these are cordaites leaves? Photo 4 is a Pennsylvanian fossil from Kentucky that has sphenophylem leaf on the reverse. Is it a lycopod or possibly a cordaites fossil? Photo 5 is of a fossil collected by a coal miner in Pennsylvania; he though it looked like a tire track. It has no leaf scars and there appears to be a slight rectangular tiling on the fossil. Is this possibly inner bark or sigillarius bark? Photo 6 is from the Carboniferous in Oklahoma. It has a high iron content. Photo 7 demonstrates that it apparently grew in layers ~5 mm thick. One opinion suggests that it is lycopod bark. Any other suggestions. Constructive comments would be greatly appreciated. #1 #2 #3 #4 # 5 # 6 #7
  4. paleoflor

    Cordaianthus sp.

    From the album: Steinbruch Piesberg (Osnabrück, Germany)

    © T.K.T. Wolterbeek

  5. icycatelf

    Reed pith or 3D leaf?

    I actually found this several years ago, around the time I started collecting, and always assumed it was a type of Calamites. However, I recently noticed that Cordaites leaves (such as this example) have a very similar appearance. I wouldn't have expected it to have been preserved so... cylindrically though? Roughly 1.5" wide. Thoughts?
  6. historianmichael

    Cordaites borassifolius

    From the album: Llewellyn Formation Plants of Pennsylvania

    Cordaites borassifolius Late Pennsylvanian Llewellyn Formation Centralia, PA
  7. historianmichael

    Cordaites borassifolius

    From the album: Llewellyn Formation Plants of Pennsylvania

    Cordaites borassifolius and Sigillaria elegans Late Pennsylvanian Llewellyn Formation Centralia, PA
  8. It's been a long time since I've written a trip report. Not that I wasn't hiking, I was hiking like mad and finding stuff. Just didn't get around to documenting in the latter part of 2020. Too much craziness. A couple of days ago, I went in search of an extremely elusive shale formation, that contains some of the loveliest ferns I have seen. My records show I specifically planned 13 hikes last year trying to find another exposure. That was over 100 miles of fruitless searching. Zero. Zilch. Well, two days ago I found another small exposure. Scenic photos of the journey follow starting with walking uphill on an Ordovician rock bed The Ordovician transitioned into this Silurian bed with Devonian formations rising above it on the left Although fairly stumble-free walking this was relatively steep. That day I ascended 2,800 ft with my big pack full of tools, food and drinks. A nice shattered chert nodule in the Devonian. Just to show not everything has fierce thorns here, some 'Cushion Buckwheat'
  9. paleoflor

    Cordaianthus sp.

    From the album: Steinbruch Piesberg (Osnabrück, Germany)

    © T.K.T. Wolterbeek

  10. historianmichael

    Calamites or Cordaites?

    Many years ago my dad and I visited St. Clair, PA to collect its famed Late Pennsylvanian plant material. With the closure of St. Clair to public collecting, several years ago, we went to the next best place: Centralia, PA. In going back through our finds to ascribe a proper classification to them, I have come across several finds that I believe could either be Calamites stems or Cordaites leaves. The issue is that these fossils preserved without much detail to go on. In doing some research online and on here, I think I have figured it out, but I am not completely sure. Any help is greatly appreciated. Thanks! At St. Clair, we found several of these wide impressions. It appears to lack any diagnostic features to make it easily identifiable. Calamites stems? At Centralia, we found this not-as-wide impression. This one does have some detail to it. You can see what looks to be veins running vertically. Cordaites leaf piece? This issue though is that we also found this larger impression at Centralia that I also believe to be a Cordaites leaf. This similarly has vertical lines, but they are somewhat different from the other piece. I don't think this is a Calamites stem impression because of its width and the fact it is missing recognizable horizontal breaks. But perhaps I have this all mixed up.
  11. blackmoth

    spores on leave?

    a friend of mine found this in a Pennsylvanian shale near baijing. The leave, of which the width is about 1cm(which could serve as a scale) is not well preserved and possibly of cordaites, which is very common there. We've never seen the grains like this before, of which a wild guess is some aqua-plant's spores. They are not pits as may be taken looking at the second pic. any ideas?
  12. I'm piling back in late from a fossil hunt and wanted to get this online. Found in a lower Pennsylvanian formation locally. Typically find cordaites and ferns in this formation. Today, this odd split pair caught my attention. For size reference the small calamite next to the split pair is a little over 5 cm long and 2 cm wide. Although not a great field shot I'm posting it up now in case someone can point me in a solid research direction. Part of me thinks cordaite but the unusual branching features on one side only are quite odd to me. Perhaps some sort of rhizomic structure? I will post a close-up tomorrow when I have access to natural light again. Thanks for any advice or suggestions, Kato
  13. I decided to get out for what might have been the last warm day in the 70's (Farenheit) for a walkabout to explore high country access and exit points for some long climbs I would like to do this winter. For this trip I rucked primarily in the lower Pennsylvanian formations looking specifically for a new occurrence of mineral rich shale formations similar to one I had found last year that yielded plant fossils. I did manage to find a small but new-to-me location that was very geologically complex having anomalies in the midst of the shale/sandstone formations. First this Cordaite about 5" tall (12.5 mm) Quite near were numerous Liesegang specimens. This one about 2" x 2" (5mm x 5mm) There seemed to be at least two small areas where hot gasses may have vented through the field leaving small seams of quartz-like material. In one location samples present as Bornite. The largest piece below is 3" x 6" (7.5mm x 15.5mm) The other area was just at the contact zone between the shale having plant fossils and sandstone having plant fossils. This specimen seems to have mostly converted the sandstone and permineralized material into quartz. There is a small specimen of permineralized material left in the lower right corner. Also, there is some mineralization which I believe is mostly iron. As this new location is about 4.5 miles from where I parked my vehicle I did not collect many specimens (small pack) but plan to go back and spend more time searching.
  14. L.S., To liberate storage space, I would like to offer the following plant fossils for trade. All specimens below come from the Late Carboniferous of the Piesberg quarry near Osnabrück (Germany). Scale on photographs in centimetres (1 inch = 2.54 cm). Specimens B, C, F and G show neuropterid fronds of various sizes (most likely Laveineopteris rarinervis). Note specimens B and G were recovered broken and have been glued/repaired. Specimen E is a large plate and shows reproductive structures of Calamites (E-1), a Laveineopteris frond (E-2), a strap-like Cordaites leaf, and some Annularia-like leaf whorls. If interested, I could also offer the counterpart of E. If preferable, I can cut specimen F to size (currently large slab of rock for the actual imprint). In general, please note that these specimens are rather large and heavy (I will cover the shipping costs, but you will need space to display these pieces). In return, I would be mainly interested in plant fossils from the Devonian to Cretaceous (but feel free to offer younger material also). Kind regards, Tim Specimen B: Specimen C: Specimen E: Specimen F: Specimen G:
  15. On a short schedule for searching so it was a mad dash. I have very few ways to easily reach the Pennsylvanian Formations. Ordovician-Silurian-Devonian-Mississippian no problem. Anyway, I've found some interesting ferns in the Pennsylvanian Gobbler and wanted to see what I could find in another location about 3 miles as the crow flies away. About 1.5 miles into the site and a fairly productive morning for an initial search. Not the best of specimens but holds promise. Found this interesting brachiopod panel presenting itself with some glints. It was easily opened up by dragging my long chisel into it Some of the brachs. Not cleaned up yet.. A brach hash plate and the layer the brachs deposited on showing trace fossil depressions. Not cleaned yet A couple of phylloid algal limestone specimens
  16. hitekmastr

    Cordaites

    From the album: Carboniferous Plant Fossils in My Collection

    Cordaites were very large leaves that resembled corn leaves, with parallel grooves running the length of the leaf.

    © Copyright (c) 2019 by Michael Tomczyk. All rights reserved.

  17. Here is a sample of a fern and Cordaites along the bottom (my guess) I've been finding. Pennsylvanian formation in an area with igneous intrusions. I would enjoy being able to identify and label different fern types in the future so any help naming these now and a good source for learning more would be my ideal goal. Lastly; what induces the coloration? Is it some form of pyritization? High iron mineral content of water and ground it grew in at the time? I have additional specimen photos that appear to be of other types but I just realized my file sizes are limiting how many I can post at a time...need to learn how to do better in future posts.
  18. icycatelf

    Cordaites w/ Artisia

    From the album: icycatelf's Backyard Fossils

    Cordaites with Artisia Hyden Formation Middle Pennsylvanian Eastern Kentucky 5.6cm (length) Fossil from a Cordaites tree with pith (Artisia) exposed
  19. I_gotta_rock

    Leaf Impressions

    From the album: Carbondale, PA

    Pyrite (?) layer over shale Carbondale, PA Lewellyn Formation Pennsylvanian 299-323 myo
  20. I_gotta_rock

    Flora Hash Plate

    From the album: Carbondale, PA

    Finely parallel-veined leaves of a Cordaites plant alongside the branch or root of a giant Lycopod (aka scale tree or club moss). The latter could grow up to 50 m high! found in Carbondale, PA Lewellyn Formation Pennsylvanian (Upper Carboniferous) period 299-323 myo
  21. icycatelf

    Artisia

    From the album: icycatelf's Backyard Fossils

    Artisia Hyden Formation Middle Pennsylvanian Eastern Kentucky 8.9cm (height) Pith cast of an ancient tree-like plant, Cordaites
  22. Hannah

    Cordaites

    From the album: Kentucky Fossils

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