pleecan Posted March 24, 2010 Share Posted March 24, 2010 2yrs ago While excavating and rebuilding the boat house at the cottage at Lock 7 on the Trent River.... area is rich ordovician rock full of bryozoans... that is Giant Bryozoans... attached is fossil plate with 2.5" diameter Bryozoan.... http://www.turnstone.ca/bryozoan.htm Link to comment Share on other sites More sharing options...
Roz Posted March 24, 2010 Share Posted March 24, 2010 Those are unique. Have never seen any like those before... They are shaped like echinoids.. Welcome to the forum! Link to comment Share on other sites More sharing options...
pleecan Posted March 24, 2010 Author Share Posted March 24, 2010 Hi Roz: These bryozoans are the biggest that I have ever seen in ordovician deposits.... may be unique to this particular area. Peter Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 24, 2010 Share Posted March 24, 2010 Peter: Those Prasopora (I assume) do get quite a bit larger. I'll post some pics when I get home this evening There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
pleecan Posted March 24, 2010 Author Share Posted March 24, 2010 Thats great Kevin... look forward to those pics! Peter Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 25, 2010 Share Posted March 25, 2010 OK, here are some pics. Identifications may be off, as the only way to truly ID bryozoans is to thin-section them and view under a microscope. I don't want to damage my pieces, so bear with me. 1) Prasopora simulatrix- just under 3" wide 2) Prasopora or possibly Mesotryps- 3 1/4" wide 3) Prasopora with negative of Hormotoma gastropod on bottom 4) Large sheet-like bryozoan (Athrophragma?) There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 25, 2010 Share Posted March 25, 2010 5) Mesh-like Stictoporellina 6) Branch-like Homotrypa 7) Another Homotrypa 8) Mystery from Beamsville ON There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 25, 2010 Share Posted March 25, 2010 My babies: 9) VERY rare Constellaria 10) Plate of a couple of dozen Prasopora, largest about 2 1/4" wide. Sorry about the background, I lost the original pic I had. There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
pleecan Posted March 25, 2010 Author Share Posted March 25, 2010 That is a great collection Kevin! and they are big! Thanks for showing them. Peter Link to comment Share on other sites More sharing options...
pleecan Posted March 25, 2010 Author Share Posted March 25, 2010 My babies: 9) VERY rare Constellaria 10) Plate of a couple of dozen Prasopora, largest about 2 1/4" wide. Sorry about the background, I lost the original pic I had. Now that is a prized lot! Very nice Kevin. Peter Link to comment Share on other sites More sharing options...
glacialerratic Posted March 25, 2010 Share Posted March 25, 2010 Nice stuff, Kevin and Peter! Thanks for sharing, Tim Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 25, 2010 Share Posted March 25, 2010 Thanks for the compliments. I should add that the mystery piece is Silurian (Lockport Fm.) and the rest are Ordovician. The Athrophagma is Bobcaygeon Fm. and all others are Verulam Fm. There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Wakaritai Posted March 26, 2010 Share Posted March 26, 2010 (edited) I just found this about 2 days ago. It is the only bryozoan that I've seen that has agatized. It has several different colors, and is also larger, more detailed, and more "3-D" compared to similar bryozoans I've found. It looks to me like there may be more than one species here, but I don't know anything about bryozoans, so and input to that would be greatly appreciated But it still has dirt and whatnot on it, and I was in low light at the time so I had to use a very small F-stop (shallow depth of field), so the pic isn't the greatest. One thing that is particularly intriguing for me is in the edges of the rock... I'm convinced it was a geode at some point before being broken up. I'm going to have to scour the area looking for other pieces of it at some point In the past, I've had pretty good luck finding missing pieces (about 50%), but this will be a challenge as it was found on the side of a hill, and near where some apparent digging was done. For size reference, the "base" of the largest bryozoan, where it is broken, is approx 25 mm wide. To the best of my knowledge, it is Mississippian (Carboniferous). Edited March 26, 2010 by Wakaritai Link to comment Share on other sites More sharing options...
Auspex Posted March 26, 2010 Share Posted March 26, 2010 Link: fenestrate bryozoans "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...
Plantguy Posted March 27, 2010 Share Posted March 27, 2010 Wakaritai, PL and Northern Sharks, neat finds/interesting specimens you've posted..thanks. I think alot of us tend to not pick up these little guys when we see them or sometimes overlook them in search of different larger material, but they are really kind of neat. I regret having done that in the past so the only ones that I can really show you now are several tiny unidentified specimens within a brachiopod block that I have. Someday I hope to get this 8 inch/20cm block fully prepped as there are all kinds of interesting fragments of different invertebrates within. Some of the bryozoans and what I believe is part of a trilobite are pyritized. The details: Dalmanella meeki Waynesville Formation Ordovician St. Leon, Indiana Some closeups...that need a little sharper focus....my eyes aint what they used to be..but, I keep trying! Regards, Chris Link to comment Share on other sites More sharing options...
pleecan Posted March 27, 2010 Author Share Posted March 27, 2010 Thanks Chris, Wakaritai, and Northern Sharks for taking the time and posting your bryozoan pics. Peter Link to comment Share on other sites More sharing options...
Harry Pristis Posted March 27, 2010 Share Posted March 27, 2010 Here's a chunk of stream gravel that I picked up in Sugar Creek in Eastern Indiana. I was just getting interested in fossils at the time, and thought this fossil was cool as heck. I had a local lapidary cut a cabochon from the piece for my wife, then I had him polish the cut face for me. The zooids are so small, the cab didn't make much of a conversation piece. There are a number of possible IDs for this bryozoan; but, I don't know which to call it. The stream gravel certainly contained a mix of Paleozoic forms, both native to Indiana and exotic glacial erratics. The zooarium is flattish, not obviously branching, and it is stream-rounded to some degree. If you have an opinion, I'd like to hear it. http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
pleecan Posted March 27, 2010 Author Share Posted March 27, 2010 Neat looking microstuctures when polished... thanks for posting Harry. Peter Link to comment Share on other sites More sharing options...
Wakaritai Posted March 27, 2010 Share Posted March 27, 2010 Plantguy, that is a nice piece. I take it that that piece is more concentrated than most other pieces in the area? Are those tyes of concentrations pretty much random, or are there known reasons for areas like that? Are they isolated pieces or layers? (sorry for all the questions ) Harry Pristis, nice find, and nice work on it as well. In fact you've piqued my interest in maybe having some of that done... What did it cost to get that done? Any good places to search for local lapidaries? Link to comment Share on other sites More sharing options...
Harry Pristis Posted March 27, 2010 Share Posted March 27, 2010 . . . Harry Pristis, nice find, and nice work on it as well. In fact you've piqued my interest in maybe having some of that done... What did it cost to get that done? Any good places to search for local lapidaries? Glad you like the specimen. For a lapidary, check with your public library (the "reference librarian") for local rockhound groups. Negotiate your deal within your budget -- lapidaries don't usually do this for monetary reasons so I am aware of no rate schedule. You might trade the work for a sample of your material. Let us hear how it works for you. http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
bubonius Posted March 30, 2010 Share Posted March 30, 2010 (edited) Hy to everyone, Usually when hiking to dig fossil ,I never collect briozoan...............but...... This specimen (still clean), but almost 90% complete was a lucky meeting, comes from sands of the lower Pliocene, but I absolutely do not know its systematic identification, maybe it's family Reteporidae what think about? Edited March 30, 2010 by bubonius Link to comment Share on other sites More sharing options...
megalania Posted March 30, 2010 Share Posted March 30, 2010 heres a recent find from tasmania australia Link to comment Share on other sites More sharing options...
pleecan Posted March 30, 2010 Author Share Posted March 30, 2010 Megalania and Bobonius Thanks for posting. PL Link to comment Share on other sites More sharing options...
JimB88 Posted April 14, 2010 Share Posted April 14, 2010 Some Archimedes and Fenestella from the upper Mississippian of Tennessee. Link to comment Share on other sites More sharing options...
pleecan Posted April 14, 2010 Author Share Posted April 14, 2010 Thanks for posting Jim. PL Link to comment Share on other sites More sharing options...
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