Bob Saunders Posted October 27, 2019 Share Posted October 27, 2019 I Found this last week on what I believe some call Lake Michigan Brownstone ? 3 5/8th in x 4 inch. Has Bryozoans and one I believe is a brachiopod 15 mm wide attached to the side. Bob 1 Link to comment Share on other sites More sharing options...
connorp Posted October 27, 2019 Share Posted October 27, 2019 I would agree with you on both. Probably won't be able to identify the bryozoa any more than that, they are notoriously difficult to ID. Maybe someone here recognizes the brachiopod. Nice find! Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted October 28, 2019 Share Posted October 28, 2019 The brachiopod appears to be a rhynchonellid, but could possibly be an orthid. Further determination could be difficult. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Bob Saunders Posted October 28, 2019 Author Share Posted October 28, 2019 Taxon: Rhipidomella sp. The images are a match and I have a specimen. Known to Michigan but my County in South West Mich. is off the radar for fossils. I have dental tools so may see if I can clean it up some. Thank's, Bob Link to comment Share on other sites More sharing options...
Northern Sharks Posted October 28, 2019 Share Posted October 28, 2019 46 minutes ago, Bob Saunders said: Taxon: Rhipidomella sp. The images are a match and I have a specimen. Known to Michigan but my County in South West Mich. is off the radar for fossils. I have dental tools so may see if I can clean it up some. Thank's, Bob The ribs are far too coarse to be Rhipidomella. Possibly Atrypa??? 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...
FossilDAWG Posted October 28, 2019 Share Posted October 28, 2019 Doesn't look atrypid to me, as there are no frills ornamenting the ribs. Also completely unlike Rhipidomella, the ribs are far too coarse for one thing. What is the age of "Michigan brownstone"? It's hard to make a positive suggestions (as opposed to just saying "nope that's not it) without any real geological context. Age is a must, and actual formation (as opposed to local collector's slang) is very helpful. Don Link to comment Share on other sites More sharing options...
Bob Saunders Posted October 28, 2019 Author Share Posted October 28, 2019 Thanks for the replies, I will try to get more information at our club meeting Wednesday. Around Holland, Michigan and around 80 miles north of Indiana. This is from a farm pond dig with a crane. Owner say's around 12-14 foot deep. Finding many Crinoids fossil plates. Along with much sand and too much clay. If this helps with a time period etc. Link to comment Share on other sites More sharing options...
Peat Burns Posted October 29, 2019 Share Posted October 29, 2019 I'm guessing this may be Mississippian. Perhaps Coldwater Shale. Glacially transported. Link to comment Share on other sites More sharing options...
Bob Saunders Posted October 29, 2019 Author Share Posted October 29, 2019 Thanks again, here are two from yesterday. 1st 4 5/16th x 2 1/16th x 1 3/16th. 2nd 3 1/4 x 2 5/8 x 7/8th All of Michigan, Indiana is said to have been a warm shallow ocean south of the equator. 109.5 mm x 52.3 mm x 4.76 mm 82.5 mm x 66.6 mm x 22.2 mm Link to comment Share on other sites More sharing options...
FossilDAWG Posted October 29, 2019 Share Posted October 29, 2019 Those latest pieces certainly could be Mississippian, with the fenestellid bryozoans, crinoid stem ossicles, and Leptanea brachiopod. However, if it is glacially transported as Pete Burns suggested then one could still have a mix of ages and formations. Don 1 Link to comment Share on other sites More sharing options...
Shamalama Posted October 29, 2019 Share Posted October 29, 2019 On 10/28/2019 at 9:16 AM, Northern Sharks said: The ribs are far too coarse to be Rhipidomella. Possibly Atrypa??? I agree with Kevin, Ribs are too coarse and there appears to be a shallow sulcus visible. My vote is for a Spirifirid of some sort. As for the Bryozoans, if the rock is Devonian in age I would suggest either Thamnopora sp. or Thamnopytchia sp. 1 -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
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