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Found 578 results

  1. the title says it all Fu JOP2017ichno14.pdf
  2. Lit.: Volume 16: Fossil Fishes of Great Britain. Chapter 6: Mid-Devonian fossil fishes sites of Scotland. Site: JOHN O'GROATS, CAITHNESS (GCR ID: 353) Emma Jude, Zerina Johanson, Anton Kearsley and Matt Friedman(2014): Early evolution of the lungfish pectoral-fin endoskeleton: evidence from the Middle Devonian (Givetian) Pentlandia macroptera. Frontiers in Earth Science, 2014, Vol. 2, Article 18
  3. I have a number of mortality plates that I collected from the middle/upper Devonian Hamilton formation near Ithaca New York. In case the photos aren't clear, it's mostly brachiopod and crinoid hash. Would be interested in trading for any vertebrate material. Or invertebrate that lies outside the Devonian (maybe a similar mortality plate from the Ordovician or Silurian, so I could compare). Anyone interested? Make me an offer. Matt
  4. The little fish, Palaeospondylus gunni, from the Middle Devonian of Achanarras, Caithness, is perhaps the most widely known of all problematical fossils. Ever since it was first described by Traquair in 1890, it has attracted the attention of a very large number of workers. Nevertheless, its affinities have not yet been convincingly demonstrated. The phylogeny of this bizarre fossil has puzzled scientists since its discovery in 1890, and many taxonomies have been suggested. Traquair and the majority of writers have considered Palaeospondylus to be related to Cyclostomes. However, other workers proposed that Palaeospondylus was a larval lungfish, a larval tetrapod, an unarmored placoderm, an agnathan or a chimera. In 2016, Tatsuya Hirasawa, Yasuhiro Oisi and Shigeru Kuratani proposed that Palaeospondylus was a primitive hagfish. Lit.: J. A. Moy-Thomas (1940): The Devonian Fish Palaeospondylus gunni Traquair. Philosphical Transactions of the Royal Society B. 1940, Volume 230, issue 573 Tatsuya Hirasawa, Yasuhiro Oisi and Shigeru Kuratani (2016): Palaeospondylus as a primitive hagfish. Zoological Letters 2016, 2:20 Volume 16: Fossil Fishes of Great Britain Chapter 6: Mid-Devonian fossil fishes sites of Scotland. Site: ACHANARRAS QUARRY (GCR ID: 351) Achanarras Quarry
  5. Beach gravel find.
  6. Penn Dixie Dig With The Experts

    until
    2017 Dig with the Experts Thanks to increased interest, Dig with the Experts will be a two-day program in 2017! Ticket sales have begun — please select the links below to be taken to our online ticketing page. Alternatively, you may mail a check to us at Hamburg Natural History Society, 3556 Lakeshore Road, Blasdell, NY 14219. Please include the number of guests in your party and date(s) along with your order. Dates: Saturday May 27: 9 am to 4 pm Sunday May 28: 9 am to 4 pm Monday May 29: (Memorial Day) if there is enough interest Cost: Saturday May 27: Members $25, non-members $30 Sunday May 28: Members $15, non-members $20 Saturday & Sunday: Members $30, non-members $40 – SAVE $10 Monday May 29: TBD Join us for our signature event — Dig with the Experts! This is our very popular and yearly opportunity to unearth the best, most complete, and most unexpected fossils at Penn Dixie. We’ll have equipment on-site to do the heavy lifting and scientific experts on site to help with locating and identifying the best fossils. You’ll have to do your share of splitting and digging, of course, but you’re guaranteed to find something cool and interesting. Volunteers will lead the dig in a freshly excavated section of the Lower Windom Shale and will demonstrate how to find trilobites, cephalopods, fish remains, brachiopods, corals, wood, and many of the other fossils that can be found at Penn Dixie. But, wait — there’s more! ‘Paleo’ Joe Kchodl will once again join us for a special presentation the evening before the dig. Paleo Joe will present: Trilobite Treasures: Arthropods of the Ancient Seas at 6:30 pm in the Gateway Building Auditorium, 3556 Lakeshore Road in Blasdell, NY. The talk is FREE for Penn Dixie members and $5 for the public. Dig with the Experts draws collectors from around the globe for this unique opportunity, which is co-led by our friends from the Cincinnati Dry Dredgers. Bring a hammer, chisel, safety glasses, newspaper, and paper towels to wrap your fossils. Extra water is recommended, plus bring rain gear just in case the weather doesn’t cooperate. Penn Dixie Site 4050 North Street Blasdell, NY 14219 (716) 627-4560
  7. U. asperula is a rather common sea star in Bundenbach. Synonyms are Protasteracanthion primus and Roemeraster asperula.
  8. While moving into my new workshop I came across some cool pieces from my collection that I'm not sure I had ever photographed. My camera flash is broken, so I just took these using a cell phone. There are a few oddities that I'm not sure of their IDs, and a few that are just cool pieces. Appears to be a partial Actinopteria decussata. Not a common find at the site. Looks like a nautiloid, perhaps a Orthoceras or Spyroceras, but has a really weird surface texture to it. Nice long section of crinoid stem. This was very tough to stabilize, it was practically jumping out of the matrix piece by piece. A big honkin' Eldredgeops rana that's partially enrolled. Still prepping him out. Unfortunately he's missing a chunk of the left librigina. You can also see the spines of a well-preserved Spinatrypa spinosa in the bottom of the frame. I don't know what this is. It's concave, and I think it's the interior of a Spyroceras, but I can't be sure it's such an odd segment to try and classify from.
  9. Hi this is Matt again I have 3 favosites fossils I have found in the creek I wanted to show everyone here are 3 photos
  10. Found these on rocky hill near grand lake in Oklahoma. thanks looks like maybe Devonian with lots of black shale in rocks thanks!!
  11. Found on rocky hill top in Delaware county Oklahoma. Devonian? Black shale in some rocks and lots of sparkly veins. Thanks
  12. Hi everybody. I'm trying to prepare this trilobite from Lower Devonian of Spain. Finalky I put off the rock and clean some parts, but now I have this problem: what's the best method for clean small details? What do you recommend me? Regards Juan
  13. Two excellent papers about the Early Devonian of Podolia Lit.: VICTOR VOICHYSHYN (2011): THE EARLY DEVONIAN ARMOURED AGNATHANS OF PODOLIA, UKRAINE. PALAEONTOLOGIA POLONICA,  No. 66, 2011, pp 1-211. Voichyshyn V.K. (2015): Devonian Fish Fauna. – Lviv, 2015. – 310 p. (Scientific collections of the State Natural History Museum; Issue 5).
  14. Coccosteus cuspidatus Miller, 1841

    The two most common fish are Coccosteus cuspidatus and Dipterus valenciennesi Lit.: A Guide to Achanarras Fossils Volume 16: Fossil Fishes of Great Britain Chapter 6: Mid-Devonian fossil fishes sites of Scotland. Site: ACHANARRAS QUARRY (GCR ID: 351)
  15. Went out to one of my favorite roadside collecting spots shortly after I moved back to the Altoona, Blair County, PA, USA area. Cold, drizzly day but a bad day of rockhounding beats the best day of work! Here's a pic of a cleaned sample (approx. 3inx4in) of Crinoidal limestone (Shriver Formation - late Surilian/early Devonian). I've included a link {http://fcopg.org/wp-content/uploads/2014/06/68th2003.pdf } to a detailed description of the site. Hopefully this spring I'll be able to figure out where the trilobites are hiding.
  16. Chotecops ferdinandi (Kayser, 1880)

    Chotecops is the most abundant trilobite in the Hunsrück Slate and due to the excellent preservation, often soft tissue such as antennae and legs have been preserved as a thin sheet of pyrite.
  17. Found this small Lower Devonian brachiopod two weeks ago- Meristella laevis with part of the outer shell broken away exposing the internal anatomy. It was found near Deer Park, NY. in Orange County. A special thanks to Gordon on the Forum for showing me this small exposure.
  18. While researching what caused the current invertebrate fossil of the month to have such a wonderful iridescence (www.thefossilforum.com), I came across some interesting info on preservation of color patterns in fossil shells. In Northern California where I live, most of the color of a fossil shell disappears after a few thousand years. The pattern of color is gone in a couple million years. While in Texas, I collected Texigryphea from the early Cretaceous that still had color patterns of dark radial bands. Finding a paper about Devonian brachiopods with color patterns surprised me. See: http://www.bioone.org/doi/full/10.4202/app.2010.0066 “First Colour-Patterned Strophomenide Brachiopod from the Earliest Devonian of Podolia, Ukraine” by Andrzej Baliński, found in Acta Palaeontologica Polonica 55(4):695-700. 2010. The first figure below shows the spotted pattern found on the convex shell of a strophomenid brachiopod from Ukraine. Wow, what a camouflage! The brachiopods blended right in against the light-colored rock with dark spots. I am reminded of well camouflaged modern mottled and spotted moths that are hard to see when they are on certain trees and rocks. The second figure shows a variety of color patterns found in fossil brachiopods. The paper suggests that brachiopods with colors and patterns occur in shallow water in the photic zone and in areas with warmer water. Few are found in cold polar waters. A similar distribution of colored shells and mollusks exists today. Shallow tropical species are very colorful while polar and deep water species are not. Show us some of your older fossil shells with colored patterns: Cretaceous and older.
  19. Lit.: Bartels, Christoph u.a. (1997): Schatzkammer Dachschiefer: Die Lebenswelt des Hunsrückschiefer-Meeres. Mainz/Bochum (Landessammlung für Naturkunde Rheinland-Pfalz und Deutsches Bergbau-Museum Bochum)
  20. Today I returned to Hannacroix Ravine, a site in Southern Albany County, NY. (Helderberg Plateau) I last visited over three years ago. It is a beautiful site along a narrow cliff lined ravine, however it is tough to get to requiring a steep decent from the road and making one's way through thick prickly bushes and downed trees. No wonder why I've avoided this place in favor of road cuts and quarries. The stream itself was barely flowing, more just a series of shallow pools and mud. It was a cool, sunny day (temperatures in the 40s and later low 50s), but perpetually shady in the deep ravine. I was collecting from deep water strata in the Dave Elliot Bed, part of the Mount Marion Formation which is part of the Marcellus Shale which forms the lowest part of the Middle Devonian Hamilton Group. The rock was primarily siltstone, not terribly hard to remove decent sized pieces from the wall which hung precariously overhead. I was forever fearful a bunch of it would collapse and land on me. Some pieces did come down on their own, but none came close to hitting me. Biodiversity is very limited here: some small bivalve shells and goniatites and straight-shelled nautiloids. There appears to be even less diversity than the Dave Elliot deep water site near Kingston. Spent about six hours- the first four were mostly a dud, but in the last two found some nice goniatite and nautiloid specimens. Did even better than I did the last time I was there. The prize was this goniatite, Tornoceras mosopleuron, the best one I've collected from this site and better than any of the ones I've found at the Kingston site.
  21. Lit. IMRAN A. RAHMAN, RICHARD P. S. JEFFERIES, WOUTER H. SÜDKAMP� and RUD. A. SMITH (2009) ICHNOLOGICAL INSIGHTS INTO MITRATE PALAEOBIOLOGY. Palaeontology, Vol. 52, Part 1, 2009, pp. 127–138. RUTA, M., BARTELS, C. 1998. A redescription of the anomalocystitid mitrate Rhenocystis latipedunculata from the Lower Devonian of Germany. Palaeontology, 41, 4, 771–806.
  22. Hi everybody, it passed too much time since I was here. I need help. One friend found this in Lower Devonian sediments in Spain. He thinks is a fish tooth but I'm not sure about it. What do you think? Regards Juan
  23. Not something I find very often. Thinking it might be bryozoan, but unsure. Mid-Devonian, Widder Fm, Hamilton Gp. Any help is appreciated to ID this one so I can properly catalogue it.
  24. Devonian Goniatite from Albany Co., NY.

    From the album Middle Devonian

    Tornoceras mosopleuron (goniatite) Middle Devonian Mount Marion Formation Dave Elliot Bed Marcellus Shale Hamilton Group Hannacroix Ravine Clarksville, NY.
  25. Devonian Goniatite from Albany Co., NY.

    From the album Middle Devonian

    Tornoceras mosopleuron (goniatite) Middle Devonian Mount Marion Formation Dave Elliot Bed Marcellus Shale Hamilton Group Hannacroix Ravine Clarksville, NY.