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Found 112 results

  1. devonian(syn)ecology

    New data on the intergrowth of Rugosa-Bryozoa in the Lower Devonian of North Gondwana Yves PLUSQUELLEC ,Françoise P. BIGEY Carnets Geol. 19 (18) Creative Commons License DOI 10.4267/2042/70538 PDF LINK
  2. Spring of 2020 We took advantage of the time off and the break in weather to hunt one of our favorite streams here in Western New York. This was just a spring scouting mission to see what was exposed after the ice and snow has melted. Some of the more interesting finds were a crinoid crown (very rare for this locality) possibly Logocrinus, Spinocyrtia granulosa open with both valves, Orthospirifer marcyi, a large Megastrophia concava cleaned by nature with epibionts, and 3 small nearly complete Greenops. We also found many small Favosites coral colonies, large Heliophyllum corals, and 8 different species of brachiopods. Happy Collecting!
  3. A new study shows that stony corals, which provide food and shelter for almost a quarter of all ocean species, are preparing for a major extinction event. Researchers identified an increased prevalence of certain traits found with previous extinction-survival characteristics among corals. By studying the fossil record of coral skeletons, they were able to determine that corals are showing some survival traits that match the last major extinction event 66mya. These traits include an increase in deep water residence, cosmopolitan distributions, smaller colonies, non-symbiotic relationship to algae and higher resistance to bleaching. The study also discusses in detail the comparison to primates and discusses how primates don't show the same survival characteristics that some corals do. Finally the authors state that the corals that are likely to survive extinction are less likely to be from tropical coral reefs and more likely to be from smaller, solitary, slower growing & deep dwelling corals. https://www.sciencedaily.com/releases/2020/03/200303113246.htm Gal Dishon, Michal Grossowicz, Michael Krom, Gilad Guy, David F. Gruber, Dan Tchernov. Evolutionary Traits that Enable Scleractinian Corals to Survive Mass Extinction Events. Scientific Reports, 2020; 10 (1) - the article is open access https://www.nature.com/articles/s41598-020-60605-2#rightslink
  4. Hello! Finally, I have some time to post this fossil hunting trip from a warm and sunny day in October, 2019. Introduction The Miocene Styrian basin in Austria is mostly filled with various clastic sediments, e.g. fossil-rich “Florianer Schichten” around St. Josef. The “Mittelsteirische Schwelle”, a north-south trending high-zone of palaeozoic, slightly metamorphic rocks, however, is, in a very literal sense, the base of various biogenic carbonate rocks (“Leithakalk”). The individual carbonate bodies are of slightly different age – spanning the whole Badenian (about three Million years) - and composition. The younger ones to the north around Wildon are characterized by coralline algae and often oncoidic limestones, corals are extremely rare there. To the south, corals became locally an important part of the limestones, besides the coralline algae. No really big coral reef structures have developed, though; coral carpets and small coral batch reefs are characteristic. Various maps from the internet and literature of the visited area. 1 = Kittenberg; 2 = Hötzlweg Depositional scheme of the Weißenegg-formation around the “Mittelsteirische Schwelle”. Within the green rectangle the area of interest. Relief map of the area north of Heimschuh. Note the many very small to medium-sized quarries. Some cliffs are also visible. These corals are witness of tropical to subtropical temperatures in this area about 15 Million years ago. Coral development is considered to depend on local factors like sediment input or (non-)exposure to severe wave action during storms. Coral diversity is relatively high, with at least a dozen of genera described or mentioned. About four years ago, I have prospected the area north of Heimschuh several times for corals. My goal was to find some good coral sites. Fossils in the wild are not super-abundant in this formation, but I succeeded to find a few good spots. Corals are by far the most abundant fossil group, bivalves etc. are much rarer. (Note: there is a very large, active quarry for portland cement fabrication in Retznei nearby, that is famous for all kind of marine stuff, incl. Meg teeth and other large vertebrates.) I will present two sites that I have visited again at 10/17/2019, but already also four years ago. One is at Kittenberg in the woods (1), the other one is a small outcrop along a minor road called “Hötzlweg” (2). Continued...
  5. I bought a new old cabinet last winter and spent several months filling it with newly labeled specimens, most of them now stored in jewelry boxes. I took photos of it to show Tim, Fossildude19 and he suggested I post them in the Members Collections section. I followed his suggestion. The collection started in 2011 with a few fossil purchases off a well known public auction site. By the early spring of 2012 I was collecting in the field and the vast majority of my collection was self collected in that manner from sites, primarily in the Northeast and Ohio Valley as well as ones collected on trips to Texas, Germany and out west. There are also some gift specimens that I own thanks to the generosity of a number of friends, most of whom are on the Forum. The top of the cabinet is occupied by miscellaneous specimens, some that wouldn't fit in the drawers, some slated to be in a glass display case I hope to eventually get, and my collection of fossils found in New Jersey just above the Iridium Layer.
  6. Coral crazy

    Today I was pretty stressed out, but it was also my day off work so I figured what better to do than go out for a hike. Usually around this time of the year Truman Lake's water level drops, and more spots are accessible to hunt for treasures or to journey and site see. I wasn't looking for fossils but instead I was looking for fishing lures, (You'd be amazed how many you can find when the water drops) but I always keep an eye out for fossils as well. I ended up finding a nice little exposure that is usually underwater, and boy it was worth the search. It was about a hour and a half walk to where the exposure was from my car, and I didnt have long to search before the sun set. I probably had a good 40 minutes of sunlight to search and came up with a lot. So much infact, I still have a lot of cleaning to do! Some of the solitary and colonial rugose corals are geodized, or have lovely crystal lining on the inside. I didnt get to take many pictures which I regret, and my few pictures don't do the lovely crystalized coral justice. I suppose I'll share a final photo when I get everything cleaned up.
  7. I am back from my trip to morocco. It is a 14 days trip and I got 4 days for fossil hunting. It was so imagine, fossils are everywhere and even though I won't be able to dig, I still get plenty to bring home. Since my guide doesn't speak good English, I am not be able to ask him must so I need help to identify the fossil. On the first day, my guide took me to a place near Erfoud to search for dinosaur teeth. It is very close to the highway. We found a well that the local people dig to get Spinosaur teeth and bone. My husband went down to one but couldn't find anything because the well is new and it is not deep enough. We didn't want to try the deeper one so we decide to bought some spinosaur teeth from the local people there. This tooth is a little over 4.5 inches and I think there are some prepare but I can't tell how much. I also bought 3 smaller teeth and was giving the broken one which I don't know what it is.
  8. Hello, I have summarized my hunting trips to St. Bartholomä from July 2019 to September 2019. Its in German and located at an external site: Rudists St. Bartholomä - July-Sept 2019 (external site) (pdf, ca. 4.2 MB) Fell free to delete this post if you find it inappropriate. Thanks! Franz Bernhard
  9. Help to ID

  10. Cretaceous corals

    Hi everyone. Here are some specimens from an Upper Campanian - Lower Maastrichtian reef in the Catalan Pyrenees, which species’ diversity amazes me. In fact, they are collected in a 30 meter-radius point. I’ve only been able to approximate their genus (thanks to @Pachy, mostly) . So, I’ll strongly appreciate any help. Well, let’s start with the tiniest ones: Heliopora sp. (=Polytremacis), an Octocorallian: Columactinastrea sp.: Synastrea ? (Only my guess)
  11. Hello there! I was inspired by @markjw to check out the Credit River here in Mississauga, Ontario (Georgian Bay Formation, Upper Ordovician) because where I normally hunt there are typically no corals and I'd love to add a couple to my collection. Consequently, I went out for about an hour this morning before the family got up in order to try my luck, and I'm happy to say that I was successful!!! Based on information provided by @FossilDAWG in other threads here on TFF, I think all of my colonial rugose corals are Favistina calcina - here are photos of three of my specimens: Specimen #1 - side view: Specimen #2 - top and bottom views: Specimen #3 - top and bottom views: more to come...
  12. I visited Etobicoke Creek, and, as usual, the place was packed with fossils. Then I went to Credit River...a park near "The Riverwood Conservancy". At first I was disappointed, but in one place I found 3 little corals that had been packed into a mud path by hiker's boots. Here they are; all approximately 4 cm across.
  13. Paleofavosites asper

    From the album Hamilton, Ontario Fossils

    Paleofavosites asper (d’Orbigny, 1850). Coral squashed on grey shale. Found in the Manitoulin Formation of the Cataract Group on the Niagara Escarpment. Locality is the Devil’s Punchbowl, Stoney Creek, Hamilton, Ontario. Early Silurian.
  14. July 23,2019 Its been so hot working outside all week that today's fossil hunt in 70 degree temps felt cool. It was quiet in the stream (besides the sound of wildlife) when I got there in the AM and stayed that way all day. I didnt want to disturb the scene with me pounding on rocks so I surface collected and covered a large area of the stream. Along the sides of the stream are glacial erratic boulders, stones, and gravel. The tabulate corals (Chonostegites clappi, Favosites winchelli, Favosites sp.) I pictured in this post were found among these glacial rocks. In one gully off the stream I noticed a large boulder of Waterlime. I have found parts of Eurypterids in these displaced Silurian rocks before. Today I found a partial Eurypterid on one of these boulders but had to leave it where I found it. Too big and way too far to haul back. Happy Collecting, Mikeymig
  15. Hi! Here is a trip report on visiting a locality near Carlin, Nevada (one of our early videos). I'm not sure if what we decided to call "octopus beaks" (see 1:44 and image attached) are the real thing and not just fragments of brachiopods. Perhaps, somebody more knowledgeable can weigh in with the right answer. Thanks in advance!
  16. Yesterday the weather in my area hit above the 20 degrees Celsius so I dared myself to go to Streetsville in Mississauga to visit a fossil site I have not been to in 2 years. I now live in Hamilton, Ontario so travelling to Streetsville was intimidating for me using public transit from Hamilton to Streetsville. I have not been to Streetsville by the Credit River ever since I moved from Etobicoke to Hamilton, Ontario and I miss collecting in this vicinity. But I made it. :)) I took pics of exposure sites as these sites are mentioned in one of the literatures describing the Georgian Bay formation. This site exposes the Georgian Bay formation, Upper Member.
  17. Predation Marks on Hebertella?

    Hi guys so I have this Hebertella occidentalis specimen I collected yesterday from the Credit River at Streetsville, Mississauga, Ontario, which belongs to the Upper Member of the Georgian Bay Formation. Do these look like predation marks? There are also what appears to some crystallized grains inside these marks and I think they could be some sort of calcite. Sorry for the noisy grain of the image, but I hope this will help.
  18. 1930s collection

    I got this box of fossil from auction at the low price of £21. The collection is old and dates between 1933 and 1944 . Some of the collection has labels but sadly others are lost or mixed up. Most of the locations are from Yorkshire but there is also Oxfordshire and the midlands. I purchased this lot because of the small collection of corals. The some of the corals have been cut and polished. I did re-polished most of them because they seamed to have a coating to finish the process. There is also some nice plant material from coal seams it is good to get this material from now in the Uk lost localities . Please if anyone can help me fill in the blanks I have added locations I have the labels too, Robin Hoods Bay, Leeds, Wakefield , Whitby , Buckinghamshire and Midlands. I will do a better list of locations when Mrs R gets home because I can’t read some of the hand writing. I think it is a great little collection. Thanks for looking. Cheers Bobby corals 1) 2) 3) 4) 5) 6) 7) 8)
  19. Hi all, Last weekend was an awesome trip back to a site we had not been to in over 10 years. This location offers three geologic formations from Devonian to Pennsylvanian. I put a write up together for all of you on what we found, and the sites, and finally the fossils after we plunged them into the acid bath to extract them! Thanks for looking! Devonian and Pennsylvanian Fossils in the Martin and Naco Limestones Coral Locality at Tonto Creek At the convergence of the Tonto and Horton creeks east of Payson, we find three primary formations, all with some type of fossils. The lowest in the stratagraphic column is the Devonian Martin formation, a pink hued platy limestone with trace fossils and a low diversity of silicified tabulate and rugose corals. Lying directly over is the gray and melted looking Redwall Limestone. Dominated by crinoidal material in the limestones, it contains beds of brown cherts with molds of a huge variety of invertebrates. Also localized beds of oolitic limestone found in the same area contain huge Straparollus gastropods. And finally, overlying the Redwall is the Pennsylvanian Naco formation. Again many crinoids in the limestones which are more angular and reddish stained. Beds of brown/red cherts can be either totally non fossiliferous or contain both molds and casts of corals, sponges and crinoids. This locality within a half mile area contains all three formations and is a great place to spend a few hours hiking in a stunning backdrop of pine trees and flowing rivers! The Martin Limestone Locality: Here I am seen at the Disphyllum coral locality in the pink platy limestones. Dawn finds hordes of Disphyllum tubes lying right on the ground here! Fossils from the Naco near the Power Line road: Here we walked along this road to find large amounts of red cherts, some highly fossiliferous. Up ahead is the Mogollon Rim, the south end of the Colorado Plateau. Bone fragment found in Naco. This type of fossil is very rare - Most of the time we find sharks teeth that are very tiny. But here, a big piece of what is most likely a fish bone in a huge boulder. (Yes, its still there). Now some of you may question how we know this is a bone and not just a piece of petrified wood or something. First, of all, this is a deep water marine environment, with a depth around 200 meters. Bone also does not have the exterior detail of wood. Finally, it easily passed the famous "Lick and stick" test. This is where you lick your finger, and touch the fossil. The porous nature of fossil bone causes your finger to stick like touching a piece of scotch tape, and the surrounding rock will just get wet and not stick. Sharks teeth from this formation do the same thing. Aulopora - such a beautiful coral, this is a colonial tabulate with no septa visible. Side view of Disphyllum colonial rugose shows the branching pipes from a common attachment base. Disphyllum - End view of calice interiors showing septa. Unknown and poorly preserved colonial rugose from the same area. Composita c.f. Composita Subtilita brachiopods in red cherts. These were found loose on the ground. Spirifer brachs too! Disphyllum on the left and Aulopora on the right. The Aulopora was very fragmented, and if we left the limestone in the acid too long, all we would get is a pile of pieces. So as in this specimen, we only dissolved the rocks about half way down to provide a stable base to hold the corals. Even so, you have to be pretty careful on handling them! Thanks for looking. Many more shots including close ups with the microscope can be found here on our web site: http://www.schursastrophotography.com/paleo/Disphyllum022218.html
  20. This collecting trip was more of a scouting expedition than an actual dig. After the snow and ice have melted, its fun to get out and see whats newly exposed/uncovered. Today we found the usual cast of characters like horn corals, tabulate corals, brachiopods, gastropods, pelecypods, and trilobites. I was mad at myself for not having faith in a trilobite fossil that I found on this trip. It was barely visible in the rock I found it in and I thought it would be incomplete just on how it looked. I started to remove the matrix (hard limey shale) with a hammer and small chisel. The bug popped out of the rock complete and fell on the floor. The trilobite landed on its glabella and some of its shell broke off. I think I found all the pieces but I should have been more careful. After all these years of collecting I should know better. I promised myself to make up for it and that I would find a killer bug this season with some new sites that I have lined up Thanks and Happy Collecting mikeymig
  21. Yesterday I signed over my prized crinoid (my avatar) along with 20 other specimens to the University of Michigan, Museum of Paleontology. With this crinoid I donated 7 other prized crinoids, 2 blastoids, 4 Tully Monsters, 2 brachiopods, 1 Mazon insect wing, 2 corals and a Cooksonia. These will then be loaned to the Museum of Natural History to go on permanent display in the new museum to open in 2019. Hardest part was parting with my avatar crinoid. It is what I consider the finest example of an Arthroacantha from the Arkona Formation at Arkona, Ontario. Not that parting with 4 exquisite Tullys wasn't hard. Hey, I offered and they came and took. I just wanted the museum to open with very nice examples of fossils.
  22. Fossil hunting in the Ardennes

    Hello All Today and the next five days I'm on a family trip in the Ardennes. I am close to the region around Hotton. This is known for the many invertebrate fossils that can be found here. I went to a quarry first. I had to get permission from the owners but they gave if I didn't break the obvious rules of fossilhunting in an active quarry. The weather was very nice and the fossils numerous. What else does a fossilhunter want? I searched in an the loose rocks and didn't even had to use my hammer. The ground here is littered with fossil corals. In 5 minutes I found about 20 pieces. I have no Idea of the species yet.
  23. I visited a small Paleozoic (Silurian) coral reef in Indiana the other day. No earth-shattering, jaw-dropping discoveries, but it's an interesting spot with dolomitized fossils. Here's a google earth view of the center of the reef. A nice mollusk, if anyone knows what species, let me know. It shattered when I tried to extract it, but I was able to glue it back together as you can see here. Sphaerexochus romingeri cephalon After extraction.. I believe this is a Platyceras: To be continued..
  24. Supplementing the post in “Fossil Hunting Trips” about the Devonian Plabutsch-formation in Styria, Austria (with some background info): http://www.thefossilforum.com/index.php?/topic/90431-some-fossil-hunting-in-the-plabutsch-formation-of-the-palaeozoic-of-graz-styria-austria-devonian-–-eifelian/ I would like to post some more fossil specimens in this thread. More specimens will follow from time to time (hopefully). The first two specimens contain abundant branches of the tabulate coral Striatopora? suessi. Field pics of these specimens are already posted in the hunting trip, but here you can see also their side views, showing the alingment of the individual coral branches. (I don´t know why pics don´t look good here, but if you are zooming in, they are ok).
  25. Crinoids and corals?

    I found these fossils on Jebel Hafeet, Al Ain, UAE. The second rock looks like there is a criniod in it, but is more possibly a type of sponge. The first rock has quite a few things in it, including some type of coral. I would like to know what these really are.
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