Cincinnatian Collectors

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  • 1 month ago
    Ian Forsythe posted a new specimen in the group Cincinnatian Collectors from the myFOSSIL app

    Ian Forsythe has contributed a new specimen to myFOSSIL!

  • 1 month ago
    K C joined the group Cincinnatian Collectors
  • 1 month ago
  • 1 month, 1 week ago
    Jack Kallmeyer posted an update in the group Cincinnatian Collectors

    Here’s another set of pelecypods to check into.  Caritodens demissa is one of the few that have shell preservation rather than being internal molds.  This group shows “babies” under 5mm across the shells.



  • 1 month, 1 week ago
    Jack Kallmeyer posted an update in the group Cincinnatian Collectors

    I usually only keep pelecypod fossils that are well preserved.  Here in the Cincinnatian most have no shell preservation and are only internal molds.  These molds are subject to deterioration and poor preservation such that some no longer look like pelecypods at all.  This attached is an exceptional specimen about 50 mm long.  This is an internal mold with the external shell morphology over printed on it – the ridges on the right.  Note the muscle scar on the left corner.  The black coating is a carbon preservation of the original periostracum layer.  Also note that I am not good at ID for these  so no name…



    • That is an excellent find and extraordinarily preserved! I have a few nicely preserved specimens from near Flemingsburg – where is yours from?

      • This specimen comes from Causeway Road across Brookville Lake. Mollusc preservation is pretty good at the lower end of the exposure – Waynesville Fm.

        • That’s spectacular. I don’t think I’ve ever collected there!

          • I hated this site when I first collected it – found nothing. On my next visit I started finding crinoids so I spent many trips there. I ended up collecting 9 different crinoid species from the Liberty part of this exposure plus one partial ophiuroid. I have suites of crinoids from here with at least two such suites waiting for data collection and publication. Alas, the hot crinoid zone is slumped over now so I have to content myself with looking for well preserved molluscs and trilobites. How sad.

    • Jack, on your Causeway Road bivalve without an ID (very nice specimen BTW), I would suggest it’s Rhytimya sp. There is a similar specimen from the Fairmount pictured in “Review of Ordovician Pelecypods”, Pojeta, Plate 16, figure 10. That one is R. mickelboroughi (Whitfield). But your Waynesville or Liberty specimen is probably R. faberi (Miller), which is found in the Richmondian. Check Dalve 1948 to see if there is a picture of this species.

      • Bill,

        I looked at the Ohio Geological Survey VII and there are quite a few Rhytimya sp. I think you are correct with your ID. Thanks. Dalve 1948 is not illustrated. What publication and year is the Pope reference?

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  • 2 months ago
    Jennifer Bauer posted a new specimen in the group Cincinnatian Collectors from the myFOSSIL app

    Jennifer Bauer has contributed a new specimen to myFOSSIL!

  • 2 months, 1 week ago
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  • 2 months, 1 week ago
    Jennifer Bauer posted an image in the group Cincinnatian Collectors from the myFOSSIL app

    Real cute Ambonychia slab from out back of the Walmart in Elizabethtown KY. Real productive and convenient location, anyone been there recently? #fossil #collectionsite

  • 2 months, 1 week ago
    Jennifer Bauer posted a new specimen in the group Cincinnatian Collectors from the myFOSSIL app

    Jennifer Bauer has contributed a new specimen to myFOSSIL!

    • This one is a trace fossil called Diplocraterion. Probably from the Kope

    • @jkallmeyer – I think I collected it in Peebles or that’s what the side of the rock says. The caption didn’t translate from the app to the web – hopefully we can get that fixed soon!

    • Agree with Jack that the trace highlighted by the black arrow is Diplocraterion. There might be other trace activity captured in that specimen as well?? Hard to tell from just one view but always interesting when you have both vertical and horizontal traces in proximity to each other. Infers different ‘critters’ and/or behavior and possibly changing depositional energy conditions.

    • @jkallmeyer & @todd-stephenson here is what my comment in the app said: “Diplocraterion trace fossils from Peebles, OH. These are really cool structures that appear as two openings on the surface, sort of like dumbbells. This is a U-shaped burrow that is interpreted as a dwelling chamber.” Hopefully we can get this issue solved so that the web-users can get all the information from the app!

      • The Ordovician strata near Peebles are Richmondian. If this is from the large-ish roadcut on Ohio Route 32 ~6 miles west of Peebles (east of Burnt Cabin Road), the one that goes all the way up to the Brassfield, that’s probably Liberty or Whitewater equivalent, maaaaybe Waynesville down at the bottom. But I’d assume this came from the upper part, which gets rather silty and tragically unfossiliferous, with trace fossils and thin bryozoans being the only signs of life in most beds. That’s mapped by the Ohio survey as the Preachersville Member of the Drakes Formation, which is probably at least in part Whitewater Formation equivalent, though that unit is a bit ambiguous and may be time transgressive (the type Preachersville down in Kentucky probably includes Liberty, Whitewater, and perhaps Elkhorn equivalents). More detailed strat work needed…

        • On my rock I had written down Whitewater but it sounds like Preachersville Member may be the proper identification, I’ll have to look into it a bit more. I wasn’t able to edit the specimen through the app once I uploaded it and haven’t had the chance to get back to it yet…

  • 2 months, 2 weeks ago
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