Submitted on 2008-11-24 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Norway Point formation

Submitter notes: A beautiful specimen of a fragile brachiopod. It measures 36.5mm across.

Photo title: Brachiopod

Taxa present: Protoleptostrophia lirella

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Submitted on 2008-11-24 by Scott Vergiels

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: A good typical specimen approximately 28mm high.

Photo title: Gastropod

Taxa present: Platyceras carinatum

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Submitted on 2008-11-24 by Scott Vergiels

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: View 1: A very nice typical specimen measuring 46mm in length.

Photo title: Gastropod

Taxa present: Platyceras bucculentum

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Submitted on 2008-11-24 by Scott Vergiels

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: View 2: A very nice typical specimen measuring 46mm in length.

Photo title: Gastropod

Taxa present: Platyceras bucculentum

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Although not common, these fossils are found in the Silica. This shows a crinoid stem that has coiled back upon itself around its attachment point. In this case the crinoid has attached to the inside of a Phacops trilobite head. The top of the crinoid stem and cirri attachments can be seen with four coils of the stem all around it

Photo title: A fossil oddity.

Taxa present: unknown crinoid stem

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes:

Photo title: Top or tegmen view of crinoid

Taxa present: Megistocrinus multidecoratus

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This calyx was preserved in soft shale mud so that all the details were protected.

Photo title: well preserved caylx (bottom or stem view)

Taxa present: Megistocrinus multidecoratus

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: The US 10 cent piece is for scale .

Photo title: Big and little crinoid crown example of the same species.

Taxa present: Eutaxocrinus wideneri

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Both of these crowns are very small but this little one is only 7 mm high.

Photo title: Closeup of the smallest crown from previous photo

Taxa present: Eutaxocrinus wideneri

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes:

Photo title: Closeup view of largest caylx in previous entry

Taxa present: Dolatocrinus asterias

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes:

Photo title: Bottom (stem) view of previous three crinoid calyxes

Taxa present: Dolatocrinus asterias

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: These were from bioherm areas of the Alpena Limestone

Photo title: Series of crinoid calyxes graded in size, tegmen view

Taxa present: Dolatocrinus asterias

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows the curved nature of the matrix in which the crinoid was washed(?) and covered with additional matrix to preserve all.

Photo title: Third view showing the 'pipe' in which the crinoid was preserved.

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes:

Photo title: A more detailed view

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This crinoid with crown and stem was preserved at the bottom of a channel and was covered by Bryozoa. This was revealed after the fronds of bryozoans were removed.

Photo title: Crinoid with stem and arms

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Given the fauna at this location, I would venture to call this a Arthroacantha stem but there is not sufficient data to do so.

Photo title: Another view of coiled stem.

Taxa present: unknown crinoid stem

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This is a very common brachiopod in the Silica and Arkona locations but that is NOT why I have put it on this site. This is the ventral view and is quite uninteresting really, not even complete. The story is on the other side.

Photo title: A common Silica brachiopod

Taxa present: Mucrospirifer thedfordensis

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes:

Photo title: Side view of crinoid/snail with worm tubes

Taxa present: Platyceras bucculentum, Cornulites , Gilbertsocrinus ohioensis

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Note that in this speciman, there are multiple 'worm tubes' or Cornulites around the opening of the Platyceras. I have not seen this association before. Usually the Cornulites infest the lip of the large Paraspirifer bownockeri from the Silica and need an open area at their mouth. How they could have had this with the Platyceras tightly attached to the crinoid tegmen is not clear to me.

Photo title: Tegmen view of previous crinod caylx showing the snail (Platyceras) in position

Taxa present: Platyceras bucculentum, Gilbertsocrinus ohioensis, Cornulites

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The crinoid/snail combination is quite common and this is stem view of caylx

Photo title: A different species with gastropod

Taxa present: Gilbertsocrinus ohioensis, Platyceras bucculentum

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